seldom 常用作副词,在句中作状语。其实,seldom 也可用作形容词在句中作表语。具体用法如。1.seldom 可用在 it 作形式主语、后面跟一个由 that 引导的主语从句(真正主语)的结构中作表语。如:It is seldom that it snows in such a time...seldom 常用作副词,在句中作状语。其实,seldom 也可用作形容词在句中作表语。具体用法如。1.seldom 可用在 it 作形式主语、后面跟一个由 that 引导的主语从句(真正主语)的结构中作表语。如:It is seldom that it snows in such a time in spring.在春季这个时候下雪是少见的。It is seldom that she enjoyed herself that much.她这么开心是很少见的。展开更多
The paradox of our time in history is that: We have taller buildings, but shorter tempers; Wider freeways, but narrower viewpoints ; We spend more, but have less; We buy more, but enjoy it less; We have bigger houses ...The paradox of our time in history is that: We have taller buildings, but shorter tempers; Wider freeways, but narrower viewpoints ; We spend more, but have less; We buy more, but enjoy it less; We have bigger houses and smaller families ; More conveniences, but less time; We have more degrees, but less sense;展开更多
目的:对比性分析少节段和多节段髓内原发性肿瘤患者神经功能和预后的差异。方法:选择北京大学第三医院2010年1月至2015年12月显微神经外科手术治疗髓内肿瘤患者进行回顾性分析,共收集病例135例,用IJOA(improved Japanese orthopaedic as...目的:对比性分析少节段和多节段髓内原发性肿瘤患者神经功能和预后的差异。方法:选择北京大学第三医院2010年1月至2015年12月显微神经外科手术治疗髓内肿瘤患者进行回顾性分析,共收集病例135例,用IJOA(improved Japanese orthopaedic association)评分评估手术前后的神经功能状况。结果:在少节段和多节段髓内肿瘤患者中,术前IJOA评分(P=0.02)和术后早期IJOA评分(P=0.004)差异均有统计学意义,不论术前还是术后早期,少节段髓内肿瘤患者神经功能都较好一些,大部分多节段髓内肿瘤患者都有不同程度的肢体无力,但是,对于术后长期的神经功能,多节段和少节段髓内肿瘤患者的差异无统计学意义(P=0.12),经过积极的功能锻炼,多节段髓内肿瘤患者的神经功能状况得以充分改善。结论:相比多节段髓内原发肿瘤患者,少节段髓内原发肿瘤患者围手术期的神经功能状况要好一些,尤其在肢体肌力方面,经积极功能锻炼,多节段髓内肿瘤患者的远期神经功能状况得以充分改善。展开更多
Through the content analysis of nutrient elements in the soil and in the needle at thedifferent site classes and periods of growth of P.koraiensis,and in a single growing season,someconclusions can be drawn below:Most...Through the content analysis of nutrient elements in the soil and in the needle at thedifferent site classes and periods of growth of P.koraiensis,and in a single growing season,someconclusions can be drawn below:Most of the soil nutrient elements were higher at the good sitesthan at the poor ones in an annua1 average concentration of them,i.e.,site class 1】site class2】site class 3.And for P.korarensis tree at every site class,the nutrient elements in their needles didthe same.However,each of the elements in the soil or in the need was seldom at the same level ofconcentration on the good or on the poor site during different periods of growth.There are no aninevitable relationship between the contents of the soil nutrient elements and the needle’s.Andwhether these elements are high or low within a tree body may depend on the physiogical require-ment of the tree,but not on their contents in the environment.Some nutrient elements repuired forP.koraiensis varied with growth periods during a whole growing展开更多
Superior cluneal nerve injury is a com-mon soft tissue trauma in the lumbar andgluteal regions.Severe pain is often experi-enced in these regions when the section ofthe nerve below the iliac crest is displaced orinjur...Superior cluneal nerve injury is a com-mon soft tissue trauma in the lumbar andgluteal regions.Severe pain is often experi-enced in these regions when the section ofthe nerve below the iliac crest is displaced orinjured.The pain often spreads to the leg onthe injured side,but seldom goes beyond展开更多
The action of metals on living organisms has to bestudied as mixtures since exposure is seldom to asingle metal.The interaction between metals mayaffect the degree of action on enzymes.
“Uncertainty”is the most common word one encounters in reading foreignpredictions on China’s future.However,in some recent overseas comments,forinstance,the No.45 Report to the Trilateral Commission,one finds the s...“Uncertainty”is the most common word one encounters in reading foreignpredictions on China’s future.However,in some recent overseas comments,forinstance,the No.45 Report to the Trilateral Commission,one finds the seldom ex-pression“certainties”.Some foreign China experts have eventually begun to believethe continuation of China’s current plicy of reform and opening in the post-Dengera.They no longer predict the collapse of the Communist Party of China.Never-展开更多
Prospects for gradual economic recovery and rejuvenation spread out before thenew South Africa under the leadership of national unity.Rich natural en- dowments offer favorable conditions for success. South Africa boas...Prospects for gradual economic recovery and rejuvenation spread out before thenew South Africa under the leadership of national unity.Rich natural en- dowments offer favorable conditions for success. South Africa boasts rich naturalresources, some categories of mineral resources in particular, with the size of min-eral deposits and the amount of their production seldom found else where in展开更多
It is tempting to assign positive or negative roles to components of neurotrauma pathology,in an effort to generate an ordered picture and design therapeutic strategies accordingly.However nature is seldom so obliging...It is tempting to assign positive or negative roles to components of neurotrauma pathology,in an effort to generate an ordered picture and design therapeutic strategies accordingly.However nature is seldom so obliging.This principle is elegantly illustrated in a recent publication from Anderson,展开更多
Static and dynamic force performance of two types of space truss structures i.e. square pyramid space truss（SPST） and diagonal on square pyramid space truss（DSPST）, are studied to determine the effect of stiffness...Static and dynamic force performance of two types of space truss structures i.e. square pyramid space truss（SPST） and diagonal on square pyramid space truss（DSPST）, are studied to determine the effect of stiffness of their lower supporting members. A simplified model for the supporting columns and the equivalent spring mass system are presented. Furthermore, the feasibility of the simplified model is demonstrated through theoretical analysis and examples of comparative analysis of the simplified model with the entire model. Meanwhile, from the elastic analysis under frequently occurring earthquakes and elasto-plastic analysis under seldom occurring earthquakes subjected to TAFT and EL-Centro seismic oscillation it is shown that the simplified method can be encompassed in the results from the normal model. It also showed good agreement between the two methods, as well as greatly improved the computational efficiency. This study verified that the dynamic effect of the supporting structures was under considered in space truss design in the past. The method proposed in the paper has important significance for other space truss structures.展开更多
文摘seldom 常用作副词,在句中作状语。其实,seldom 也可用作形容词在句中作表语。具体用法如。1.seldom 可用在 it 作形式主语、后面跟一个由 that 引导的主语从句(真正主语)的结构中作表语。如:It is seldom that it snows in such a time in spring.在春季这个时候下雪是少见的。It is seldom that she enjoyed herself that much.她这么开心是很少见的。
文摘The paradox of our time in history is that: We have taller buildings, but shorter tempers; Wider freeways, but narrower viewpoints ; We spend more, but have less; We buy more, but enjoy it less; We have bigger houses and smaller families ; More conveniences, but less time; We have more degrees, but less sense;
文摘目的:对比性分析少节段和多节段髓内原发性肿瘤患者神经功能和预后的差异。方法:选择北京大学第三医院2010年1月至2015年12月显微神经外科手术治疗髓内肿瘤患者进行回顾性分析,共收集病例135例,用IJOA(improved Japanese orthopaedic association)评分评估手术前后的神经功能状况。结果:在少节段和多节段髓内肿瘤患者中,术前IJOA评分(P=0.02)和术后早期IJOA评分(P=0.004)差异均有统计学意义,不论术前还是术后早期,少节段髓内肿瘤患者神经功能都较好一些,大部分多节段髓内肿瘤患者都有不同程度的肢体无力,但是,对于术后长期的神经功能,多节段和少节段髓内肿瘤患者的差异无统计学意义(P=0.12),经过积极的功能锻炼,多节段髓内肿瘤患者的神经功能状况得以充分改善。结论:相比多节段髓内原发肿瘤患者,少节段髓内原发肿瘤患者围手术期的神经功能状况要好一些,尤其在肢体肌力方面,经积极功能锻炼,多节段髓内肿瘤患者的远期神经功能状况得以充分改善。
文摘Through the content analysis of nutrient elements in the soil and in the needle at thedifferent site classes and periods of growth of P.koraiensis,and in a single growing season,someconclusions can be drawn below:Most of the soil nutrient elements were higher at the good sitesthan at the poor ones in an annua1 average concentration of them,i.e.,site class 1】site class2】site class 3.And for P.korarensis tree at every site class,the nutrient elements in their needles didthe same.However,each of the elements in the soil or in the need was seldom at the same level ofconcentration on the good or on the poor site during different periods of growth.There are no aninevitable relationship between the contents of the soil nutrient elements and the needle’s.Andwhether these elements are high or low within a tree body may depend on the physiogical require-ment of the tree,but not on their contents in the environment.Some nutrient elements repuired forP.koraiensis varied with growth periods during a whole growing
文摘Superior cluneal nerve injury is a com-mon soft tissue trauma in the lumbar andgluteal regions.Severe pain is often experi-enced in these regions when the section ofthe nerve below the iliac crest is displaced orinjured.The pain often spreads to the leg onthe injured side,but seldom goes beyond
文摘The action of metals on living organisms has to bestudied as mixtures since exposure is seldom to asingle metal.The interaction between metals mayaffect the degree of action on enzymes.
文摘“Uncertainty”is the most common word one encounters in reading foreignpredictions on China’s future.However,in some recent overseas comments,forinstance,the No.45 Report to the Trilateral Commission,one finds the seldom ex-pression“certainties”.Some foreign China experts have eventually begun to believethe continuation of China’s current plicy of reform and opening in the post-Dengera.They no longer predict the collapse of the Communist Party of China.Never-
文摘Prospects for gradual economic recovery and rejuvenation spread out before thenew South Africa under the leadership of national unity.Rich natural en- dowments offer favorable conditions for success. South Africa boasts rich naturalresources, some categories of mineral resources in particular, with the size of min-eral deposits and the amount of their production seldom found else where in
文摘It is tempting to assign positive or negative roles to components of neurotrauma pathology,in an effort to generate an ordered picture and design therapeutic strategies accordingly.However nature is seldom so obliging.This principle is elegantly illustrated in a recent publication from Anderson,
基金National Technology Research and Development Program of the Ministry of Science and Technology of China under Grant No.2015BAK17B03National Natural Science Foundation of China(General Program)under Grant No.51278152
文摘Static and dynamic force performance of two types of space truss structures i.e. square pyramid space truss（SPST） and diagonal on square pyramid space truss（DSPST）, are studied to determine the effect of stiffness of their lower supporting members. A simplified model for the supporting columns and the equivalent spring mass system are presented. Furthermore, the feasibility of the simplified model is demonstrated through theoretical analysis and examples of comparative analysis of the simplified model with the entire model. Meanwhile, from the elastic analysis under frequently occurring earthquakes and elasto-plastic analysis under seldom occurring earthquakes subjected to TAFT and EL-Centro seismic oscillation it is shown that the simplified method can be encompassed in the results from the normal model. It also showed good agreement between the two methods, as well as greatly improved the computational efficiency. This study verified that the dynamic effect of the supporting structures was under considered in space truss design in the past. The method proposed in the paper has important significance for other space truss structures.
