- 推荐网络例句
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From the number of the sequence, sequences alignment contain pair-wise sequence alignment and multiple alignment.
从比对序列的数目来划分，又包括两两序列比对和多重序列比对。
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Satellite channel simulator can simulate transmission characteristics of electromagnetic wave close to real channel environment.
卫星移动通信系统已经成为当前通信领域中发展非常迅速的研究方向和现代化通信强有力的手段之一。
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We have used GC to follow up the formation of epoxy acid and established the acidify condition; we have done series of parallel experiments to better the pivotal condensation reaction between acid and amine; In the cyclization step, we use cheap and available reagent-Lithium amide , rather than expensive LiHMDS, to proceed the reaction; and at last, we introduced green reagent-ozone to clear the phenyl group of nitrogen to avoid using heavy metal reagent-CAN. The total yield for this method is 29.8%.
通过GC监测，确定环氧酸的最佳酸化条件；对关键的酸和胺的缩合步骤，平行试验了多种条件；在环合一步，用价廉易得的氨基锂及催化量的HMDS代替昂贵的LiHMDS进行反应；氮上苯基的脱除采用臭氧，避免了重金属试剂-硝酸铈铵的使用，总收率为29.8％。
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