Americans speak fast in their daily conversationsand it is sometimes difficult for ESL/EFL learnersto understand them.This is because they often speakin a“short cut”—a relaxed way evolved throughmany years.Sometime...Americans speak fast in their daily conversationsand it is sometimes difficult for ESL/EFL learnersto understand them.This is because they often speakin a“short cut”—a relaxed way evolved throughmany years.Sometimes they even write in a展开更多
Last week, I read news about school bullying with my parents, and it made me feel very sad. School bullying is a serious problem nowadays. It can happen in the classroom or even after school.
CCE asked 5 thought leaders to share their insights about the anticipated 2008 and the fruitful 2007. Learn what’s on the minds of the people leading the industry from entirely different market niches.
Yangtzeconus priscus-Archaeospira ornata, an important earliest Cambrian benthonic Assemblage of the Yangtze micromolluscan fauna, occurs mainly in the Lower Cambrian Zhongyicun and Dahai Members of the Yuhucun Format...Yangtzeconus priscus-Archaeospira ornata, an important earliest Cambrian benthonic Assemblage of the Yangtze micromolluscan fauna, occurs mainly in the Lower Cambrian Zhongyicun and Dahai Members of the Yuhucun Formation in E Yunnan, the Tianzhushan Member （=Huangshandong Member） of the Dengying Formation in W Hubei and the Maidiping Member of the Hungchunping Formation in C Sichuan, China. About 90% of the genera of this Assemblage are unknown from the Nemakit-Daldynian and Tommotian molluscan Assemblages of the Siberian Platform, Russia. About 90% of the Siberian molluscan genera do not occur in the Zhongyicun and Dahai Members in the Meishucun section and in the corresponding beds of the Yangtze Platform, because the Tommotian molluscan Assemblage is characterizedly abundant archaeocyathids. It is clearly indicated that the Yangtze and Siberian molluscan Assemblages represent different bio- and lithofacies and ages. The age of the pre-trilobitic Yangtzeconus priscus-Archaeospira ornata Assemblage is older than that of the Nemakit-Daldynian and Tommotian molluscan Assemblages and referable to the Earliest Cambrian. Two new genera Mcnamaraconus and Zhangwentangoconus are herein proposed.展开更多
In early of 1960s, I was a graduate student studying on tRNA biochemistry. In the course of the research, the magnesium ions stabilized the tertiary structure of tRNA, resulting in its resistance to enzymatic degradat...In early of 1960s, I was a graduate student studying on tRNA biochemistry. In the course of the research, the magnesium ions stabilized the tertiary structure of tRNA, resulting in its resistance to enzymatic degradation was discovered independently. The experiment of deaminated (denatured) tRNA obtained from native tRNA was designed and conducted and further proved the validity of this finding. It was found that magnesium ions could stabilize the tertiary structure of the natrive tRNA but could not stabilize structure of the deaminated tRNA. In term of the methodology, this stabilization technique has been widely applied in sequencing analysis of RNA and has greatly promoted the progress in the study of primary structure of RNA. More importantly, the stabilization of the tertiary structure of RNA by magnesium ions plays a key role both in the processing of messenger RNAs and the ribozyme activity. After our first article in Chinese was published in 1963, a paper of Nishimura & Novelli came into our note. The received date of their paper was March 22 of 1963, only 4 days earlier than that of our first paper. Thus, we and Nishimura & Novelli made almost at the same time the earliest discovery of the role of magnesium ions on stabilizing the tertiary structure of the transfer RNA and thus resulted in resistance of tRNA degradation by enzymes. However, this discovery was not initially appreciated for a period of time but was finally “visualized” and proved by X-ray crystal structure of yeast phenylalanine tRNA, which has provided more accurate information on the geometry of the magnesium-binding sites in tRNA.展开更多
Every people has its own way of saying things, its own special expressions, for example, the expression 'the nuts and bolts'. It means the basic, necessary elements of anything. Whether it be a business, a pro...Every people has its own way of saying things, its own special expressions, for example, the expression 'the nuts and bolts'. It means the basic, necessary elements of anything. Whether it be a business, a program, an operation or a plan, their nuts and bolts are what really make them work. Every machine is held together by its nuts and bolts. Without them the machine would fall apart. That is also true of any organization.展开更多
In his ice-breaking article "The Smell of the Cage in Cuneiform Digital Library" Journal 2009/4, Robert K. Englund discusses some archaic lists of slaves from Uruk III and Jemdet Nasr (Ancient Ni-ru?) about ...In his ice-breaking article "The Smell of the Cage in Cuneiform Digital Library" Journal 2009/4, Robert K. Englund discusses some archaic lists of slaves from Uruk III and Jemdet Nasr (Ancient Ni-ru?) about 3100-2900 B.C.展开更多
Based on one linguistic system-copular verb be,and hypotheses about verb be,the learner’s error types are typical with the same age group while Chinese English structure is relatively less significant.The result show...Based on one linguistic system-copular verb be,and hypotheses about verb be,the learner’s error types are typical with the same age group while Chinese English structure is relatively less significant.The result shows that the learner’s first language and earliest period of learning are both significant for her target language study.展开更多
Experiments on salinity tolerance of embryos and larvae of the southem bay scallop Argopecten irradians concentricus Say under controlled temperature of 28℃ showed that although the eggs were fertilized and cleaved a...Experiments on salinity tolerance of embryos and larvae of the southem bay scallop Argopecten irradians concentricus Say under controlled temperature of 28℃ showed that although the eggs were fertilized and cleaved at salinity 18.1 -37.4, they could further develop into normal D-shaped larvae only at salinity 23.4-36.1, while the trochophore larvae could develop into normal D-shaped larvae at salinity 22.1 -39.9. For 72 hours , the larvae could tolerate salinity of 18.4-43.9, the salinity favoring growth was 19.8-42.4; the suitable range was 21-36, and the optimum at about 28. They metamorphosed at salinity 18.9-43.5, optimally at 24-32.展开更多
Long,long ago,there was an old immortal (仙翁)who could change a stone into gold.One day a boycame to ask him for help.He pointed to a stone olq the ground,and said.“Young flellow,the stone
You don’t是一英语口语习语,常用于口头交际中。它表达的意思是轻微惊讶,近似于really。如: 1)—She graduated from Beijing University at sixteen. —You don’t say. 2)—Mary and John are going to get married. —You don’t say.
When I was ten I was suddenly confronted with① the an sh② ofmoving from the only home I had ever known. My whole life, brief asit was, had been spent in that big old house, gracefully touchedwith③the laughter and t...When I was ten I was suddenly confronted with① the an sh② ofmoving from the only home I had ever known. My whole life, brief asit was, had been spent in that big old house, gracefully touchedwith③the laughter and tears of four generations.展开更多
文摘Americans speak fast in their daily conversationsand it is sometimes difficult for ESL/EFL learnersto understand them.This is because they often speakin a“short cut”—a relaxed way evolved throughmany years.Sometimes they even write in a
文摘Last week, I read news about school bullying with my parents, and it made me feel very sad. School bullying is a serious problem nowadays. It can happen in the classroom or even after school.
文摘CCE asked 5 thought leaders to share their insights about the anticipated 2008 and the fruitful 2007. Learn what’s on the minds of the people leading the industry from entirely different market niches.
文摘Yangtzeconus priscus-Archaeospira ornata, an important earliest Cambrian benthonic Assemblage of the Yangtze micromolluscan fauna, occurs mainly in the Lower Cambrian Zhongyicun and Dahai Members of the Yuhucun Formation in E Yunnan, the Tianzhushan Member （=Huangshandong Member） of the Dengying Formation in W Hubei and the Maidiping Member of the Hungchunping Formation in C Sichuan, China. About 90% of the genera of this Assemblage are unknown from the Nemakit-Daldynian and Tommotian molluscan Assemblages of the Siberian Platform, Russia. About 90% of the Siberian molluscan genera do not occur in the Zhongyicun and Dahai Members in the Meishucun section and in the corresponding beds of the Yangtze Platform, because the Tommotian molluscan Assemblage is characterizedly abundant archaeocyathids. It is clearly indicated that the Yangtze and Siberian molluscan Assemblages represent different bio- and lithofacies and ages. The age of the pre-trilobitic Yangtzeconus priscus-Archaeospira ornata Assemblage is older than that of the Nemakit-Daldynian and Tommotian molluscan Assemblages and referable to the Earliest Cambrian. Two new genera Mcnamaraconus and Zhangwentangoconus are herein proposed.
文摘In early of 1960s, I was a graduate student studying on tRNA biochemistry. In the course of the research, the magnesium ions stabilized the tertiary structure of tRNA, resulting in its resistance to enzymatic degradation was discovered independently. The experiment of deaminated (denatured) tRNA obtained from native tRNA was designed and conducted and further proved the validity of this finding. It was found that magnesium ions could stabilize the tertiary structure of the natrive tRNA but could not stabilize structure of the deaminated tRNA. In term of the methodology, this stabilization technique has been widely applied in sequencing analysis of RNA and has greatly promoted the progress in the study of primary structure of RNA. More importantly, the stabilization of the tertiary structure of RNA by magnesium ions plays a key role both in the processing of messenger RNAs and the ribozyme activity. After our first article in Chinese was published in 1963, a paper of Nishimura & Novelli came into our note. The received date of their paper was March 22 of 1963, only 4 days earlier than that of our first paper. Thus, we and Nishimura & Novelli made almost at the same time the earliest discovery of the role of magnesium ions on stabilizing the tertiary structure of the transfer RNA and thus resulted in resistance of tRNA degradation by enzymes. However, this discovery was not initially appreciated for a period of time but was finally “visualized” and proved by X-ray crystal structure of yeast phenylalanine tRNA, which has provided more accurate information on the geometry of the magnesium-binding sites in tRNA.
文摘Every people has its own way of saying things, its own special expressions, for example, the expression 'the nuts and bolts'. It means the basic, necessary elements of anything. Whether it be a business, a program, an operation or a plan, their nuts and bolts are what really make them work. Every machine is held together by its nuts and bolts. Without them the machine would fall apart. That is also true of any organization.
文摘In his ice-breaking article "The Smell of the Cage in Cuneiform Digital Library" Journal 2009/4, Robert K. Englund discusses some archaic lists of slaves from Uruk III and Jemdet Nasr (Ancient Ni-ru?) about 3100-2900 B.C.
文摘Based on one linguistic system-copular verb be,and hypotheses about verb be,the learner’s error types are typical with the same age group while Chinese English structure is relatively less significant.The result shows that the learner’s first language and earliest period of learning are both significant for her target language study.
文摘Experiments on salinity tolerance of embryos and larvae of the southem bay scallop Argopecten irradians concentricus Say under controlled temperature of 28℃ showed that although the eggs were fertilized and cleaved at salinity 18.1 -37.4, they could further develop into normal D-shaped larvae only at salinity 23.4-36.1, while the trochophore larvae could develop into normal D-shaped larvae at salinity 22.1 -39.9. For 72 hours , the larvae could tolerate salinity of 18.4-43.9, the salinity favoring growth was 19.8-42.4; the suitable range was 21-36, and the optimum at about 28. They metamorphosed at salinity 18.9-43.5, optimally at 24-32.
文摘Long,long ago,there was an old immortal (仙翁)who could change a stone into gold.One day a boycame to ask him for help.He pointed to a stone olq the ground,and said.“Young flellow,the stone
文摘You don’t是一英语口语习语,常用于口头交际中。它表达的意思是轻微惊讶,近似于really。如: 1)—She graduated from Beijing University at sixteen. —You don’t say. 2)—Mary and John are going to get married. —You don’t say.
文摘When I was ten I was suddenly confronted with① the an sh② ofmoving from the only home I had ever known. My whole life, brief asit was, had been spent in that big old house, gracefully touchedwith③the laughter and tears of four generations.
