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- When the two isomers were heated in refluxing xylene, the cis substrate 2c rearranged to the trans product [Me2Si(c-C6H11C5H3)Fe(CO)2]2 (3t), while the trans substrate 2t to the cis product 3c. 通过柱层析分离到2的顺反两种异构体2c和2t;并分别进行热重排反应;发现顺式底物2c重排生成反式重排产物[Me_2Si(c-C_6H_(11)C_5H_3)Fe(CO)_2]_2(3t);而反式底物2t重排则生成顺式重排产物3c.
- When the two isomers were heated in refluxing xylene, the cis substrate(2c) rearranged to the trans product[Me 2Si(1-Ph-c-C 6H 10C 5H 3)Fe(CO) 2] 2(3t), while the trans substrate(2t) yielded the cis product(3c), respectively. 通过柱层析分离到化合物 2的顺反异构体 2 c和2 t;并分别进行热重排反应 ;发现顺式底物 2 c重排生成反式重排产物 [Me2 Si( c-C6H10 Ph C5H3 ) Fe( CO) 2 ]2( 3 t) ;而反式底物 2 t重排则生成顺式重排产物 3 c.
- The autumn or winter term start in September. 秋季或冬季学期九月份开始。
- There is a breath of autumn in the air today. 今天的天气已露出了一丝秋天的气息。
- The days are closing in now that autumn is here. 秋天来到了，白天渐渐短了。
- Autumn crops promised to be equally good. 秋季作物看来收成也会同样很好。
- You are invited to view our autumn collection. 您被邀请参观我们的秋季时装展览。
- The autumn woods were aflame with colour. 那片秋林红似火。
- Demand is outstripping current production. 现在需求逐渐超过了生产能力。
- After autumn, many leaves died down. 秋后，许多树叶都枯萎了。
- The leaves turn yellow in autumn. 秋天时叶子变黄。
- The trees were naked during autumn. 秋天里树木都是光秃秃的。
- A new problem has been reared up in production. 生产中出现了一个新问题。
- I hope you try to get them to step up production. 希望你们尽力使厂家增加生产。
- That car went out of production five years ago. 那种汽车已经停产五年了。
- I am reading 'Ode to Autumn' written by Keats. 我在读济慈的“秋颂”。
- The ducks of the production team have been fed out. 生产队的鸭子已养肥到可以上市了。
- The countryside glowed with autumn colours. 郊野焕发出斑斓的秋色。
- We've scaled up production to meet demand. 我们已经扩大了生产以满足需求。
- The autumn harvest is about to start. 秋收即将开始。
