The globalization and nativization processes of English resulted in the appearance of a large number of regional varieties of English. Concerning their accent between the single norm theory and the multiple norm diffe...The globalization and nativization processes of English resulted in the appearance of a large number of regional varieties of English. Concerning their accent between the single norm theory and the multiple norm differences, there has always been a debate theory. This paper argues against the ＇standard-nonstandard＇ classification of English accents upheld by the former, and revises the concept of ＇the three concentric circles of English＇ proposed by the latter, providing some helpful tips on the current instruction of listening and speaking in China＇s colleges and universities.展开更多
A large number of new varieties, especially hybrid rice, have been developed and released in China since 1998. The yield potential and grain quality of hybrid rice have also been improved significantly both for three-...A large number of new varieties, especially hybrid rice, have been developed and released in China since 1998. The yield potential and grain quality of hybrid rice have also been improved significantly both for three-line and two-line hybrid rice including indica and japonica types as well. The trends on extension of rice varieties in China since 1986 has been marked by the increasing number of new varieties, decreasing annual planting area per variety, decreasing number of varieties with a large-scale extension area, while both the renewal rate and the proportion of core varieties with cross-provincial extension have remained unchanged. This current major problems and future goals of rice breeding and extension in China were also discussed.展开更多
Standard English is defined not as a language, a style, an accent, but as standardized grammar and vocabulary with different accents. And from a linguistic point of view, Standard English is no more correct than any o...Standard English is defined not as a language, a style, an accent, but as standardized grammar and vocabulary with different accents. And from a linguistic point of view, Standard English is no more correct than any other form of English. Yet it is most prestigious, and a desirable educational target. However, different varieties of English should also be taught for international communication.展开更多
The exciting outcomes of national regional trials have led to production and industrialization of China oilseed rape to a larger extent. To understand current trends of yield and quality traits of new varieties, data ...The exciting outcomes of national regional trials have led to production and industrialization of China oilseed rape to a larger extent. To understand current trends of yield and quality traits of new varieties, data of national winter oilseed rape trials from 2001 to 2015 in 4 districts （upper, middle, lower Yangtze River and Huang-Huai River） was comprehensively analyzed. Results showed that average yield of new varieties of winter oilseed rape increased during the study period. In 2013, average yield of each district reached its highest level. Number of pod per plant reached its peak in 2011 and then declined rapidly in the next 4 years. Average number of seeds per pod did not signif-cantly changed in any districts. Moreover, 1,000 seeds weight increased most obviously in Huang-Huai River district. After 2007, new oilseed rape varieties encountered the dou-ble-low quality （i.e., low erucic acid and low glucosinolate）. In addition, oil content of new oilseed rape varieties increased over 15 years period and average oil content of all tested varieties during 2006-2015 was 42.96%, which was 2.38% higher than in 2005. Future breeding goals should be set to further improve yield, oil content, oil quality （such as high oleic acid and low saturated fatty acids）, achieve full mechanization of oilseed rape pro-duction process and develop ideotypes.展开更多
文摘The globalization and nativization processes of English resulted in the appearance of a large number of regional varieties of English. Concerning their accent between the single norm theory and the multiple norm differences, there has always been a debate theory. This paper argues against the ＇standard-nonstandard＇ classification of English accents upheld by the former, and revises the concept of ＇the three concentric circles of English＇ proposed by the latter, providing some helpful tips on the current instruction of listening and speaking in China＇s colleges and universities.
文摘A large number of new varieties, especially hybrid rice, have been developed and released in China since 1998. The yield potential and grain quality of hybrid rice have also been improved significantly both for three-line and two-line hybrid rice including indica and japonica types as well. The trends on extension of rice varieties in China since 1986 has been marked by the increasing number of new varieties, decreasing annual planting area per variety, decreasing number of varieties with a large-scale extension area, while both the renewal rate and the proportion of core varieties with cross-provincial extension have remained unchanged. This current major problems and future goals of rice breeding and extension in China were also discussed.
文摘Standard English is defined not as a language, a style, an accent, but as standardized grammar and vocabulary with different accents. And from a linguistic point of view, Standard English is no more correct than any other form of English. Yet it is most prestigious, and a desirable educational target. However, different varieties of English should also be taught for international communication.
基金supported by National key R&D program(2017 YFD0102000)
文摘The exciting outcomes of national regional trials have led to production and industrialization of China oilseed rape to a larger extent. To understand current trends of yield and quality traits of new varieties, data of national winter oilseed rape trials from 2001 to 2015 in 4 districts （upper, middle, lower Yangtze River and Huang-Huai River） was comprehensively analyzed. Results showed that average yield of new varieties of winter oilseed rape increased during the study period. In 2013, average yield of each district reached its highest level. Number of pod per plant reached its peak in 2011 and then declined rapidly in the next 4 years. Average number of seeds per pod did not signif-cantly changed in any districts. Moreover, 1,000 seeds weight increased most obviously in Huang-Huai River district. After 2007, new oilseed rape varieties encountered the dou-ble-low quality （i.e., low erucic acid and low glucosinolate）. In addition, oil content of new oilseed rape varieties increased over 15 years period and average oil content of all tested varieties during 2006-2015 was 42.96%, which was 2.38% higher than in 2005. Future breeding goals should be set to further improve yield, oil content, oil quality （such as high oleic acid and low saturated fatty acids）, achieve full mechanization of oilseed rape pro-duction process and develop ideotypes.
