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Authorities say thousands of people remain stranded in villages with food and fuel running low.
VOA: standard.2010.08.02
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You put this chromosomal DNA or this DNA that you're interested in, double stranded into a test tube.
你把这个染色体DNA,或者你感兴趣的双链的DNA,放进一个试管
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Certain double stranded RNA sequences will cause in the cell a process of degradation of very specific RNA sequence.
一些双链RNA序列能够在细胞中开启,特定RNA序列的降解程序
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"There are people stranded in Europe who cannot fly back home to Asia."
VOA: standard.2010.04.19
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Transcription just means making a single stranded RNA copy of a sequence of base pairs in a DNA.
转录的过程就是从一段DNA碱基序列中,复制出一段单链RNA
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He says that during the recent crisis, PIA provided all it could for passengers en route to their destinations, including providing accommodations for passengers stranded in Paris.
VOA: standard.2010.04.23
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When it sees that sequence in a double stranded DNA it will bind there and it will cut.
当它在双链DNA中发现这个序列,就会与之结合并切割
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For six years, audiences around the globe tuned in to follow the adventures of the survivors of a plane crash, stranded on a mysterious and dangerous island.
VOA: standard.2010.05.25
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It doesn't cut straight across the double stranded DNA but it cuts in this jagged fashion.
它不直接横切双链DNA,而是留下一个锯齿形切口
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I'm going to start by talking about a very specific and interesting form of double stranded DNA called a plasmid and plasmids occur in nature.
我要从一种十分特殊,并有趣的双链DNA开始,这种双链DNA被称为质粒,它在自然界就存在
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It exists in a double stranded form where every strand is matched by its complement.
这种碱基配对存在于DNA双链中,每条单链都与其互补链,通过这个原则配对组合
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It has to do with the nature of this complementary binding between double stranded DNA and the fidelity of this base pair matching in forming stable DNA molecules.
这些特性能从根本上解释,为何DNA双链的碱基能互补配对,以及在形成稳定的DNA分子结构时,碱基互补配对为何具有一致性
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When it's double stranded this gene can't be translated, because you have to have the single strand in order for the transfer RNA to bind and for this process of translation to take place.
当基因处于双链结构状态时,是不能进行翻译的,因为必须把双链拆开得到单链,才能结合转运RNA并开始翻译过程
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The first step is to take the DNA fragments that we're interested in and put them into this vector by basically cutting open the double stranded DNA and inserting the gene that we like in the region where we've cut.
第一步是把我们感兴趣的DNA片段,整合到这个载体里,基本的方法是切开质粒这个双链DNA,把我们想要的基因插入切开的区域
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It operates in a similar fashion to DNA polymerase in that it denatures locally or opens up the double stranded DNA, but it's different in that it creates a new polymer from the DNA template in the language of RNA, using RNA nucleotides and not DNA nucleotides.
它的作用机制类似于DNA聚合酶,在局部使DNA双链变性,解旋,但不同的是,它合成了一个基于DNA模板的,使用RNA编码语言的新聚合物,即使用核糖核苷而非脱氧核糖核苷
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