查询词典 protract
- 与 protract 相关的网络例句 [注：此内容来源于网络，仅供参考]
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Since Watson and Crick have brought forward the model of DNA helix structure and explain about it's reproduce mechanism in molecule level, research work concerning DNA has been continuously lucubrated. However, whether translating inheritance information and rebuilding DNA molecule via menstruating DNA sequence, or to date the most compelling gene project, chromosome protract et. al, there all need a sort of molecule scissors cleaving DNA, DNA cleavage reagent. At present, tool enzyme of cleaving DNA is mostly DNA restriction enzymes founded in 70 years, which only cleave DNA at specific 4-8 base pair sequences that are usually palindromic, so this restricts the at very fast speed developing of gene technology at certain extent.
自从Watson和Crick提出DNA的双螺旋结构并对其复制机制在分子水平上进行解释后，使得对DNA的研究不断深入，但无论是通过测定DNA的序列来破译遗传信息、改造DNA分子，还是目前最令人关注的基因工程、染色体绘制等，都需要一种断裂DNA分子的&剪刀&——DNA断裂试剂，目前断裂DNA的工具酶主要是上个世纪70年代发现的DNA限制性内切酶，但所知的Ⅱ型限制性内切酶的DNA序列识别长度较短（约为4～8个碱基对），而且一般要求回文结构，这就给飞速发展的基因工程技术带来一定的限制。
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Marc software, and analyze influence to the craniofacial complex against different strength and direction of protraction, then calculate the stress、 strain and displacement values at 320 different conditions, and finally protract the stress anddisplacement nephograms.
Marc软件模拟上颌前牵引的边界条件，分析比较了不同大小和方向前牵引力对颅面复合体的影响，计算320种工况下模型每个节点应力、应变和位移的数据。
- 推荐网络例句
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The system can be widely used in belt weighing and batching process control,etc.
介绍了基于智能模糊控制的嵌入式配料系统的设计方法，对模糊PID控制过程和系统调零作了重点的讨论，同时给出了PID控制的程序流程图和系统定长调零子程序。
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"I dunno," she answered,"but if you show me aroun', I'll recognize it from the lighthouse just outside the porthole."
"我不知道，"她回答说，"如果你能带我转转，我能认出来的，因为灯塔就在舷窗外。"
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That experience was of great benefit to me.
那次经历对我很有益处。