From the greenhouse, these orchids are carefully transported to the Botanic Garden, at the base of the U.S.Capitol.

VOA: standard.2010.02.21

And there's a real spatial sense here, that it's being generated at the base of the world, and it goes up and it transforms these mountains into papier-mache.

这里有一种真实的空间感，是从世界的基本中产生的，这种空间感上升并转化成这些纸型的山。

耶鲁公开课 - 1945年后的美国小说课程节选

One of the things about these plasmids that makes them very useful is that their entire base pair sequences is known.

质粒之所以有用,其中一个原因就是,它的全部碱基序列都是已知的

耶鲁公开课 - 生物医学工程探索课程节选

And these tree trunks were the chords and at the base of each of these chords at least conceptually, theoretically, is this thing called the root.

这些树干就是和弦，而每个和弦的底部，从理论上说，就是被称为根的东西。

耶鲁公开课 - 聆听音乐课程节选

Now, of course, there are denominator issues here because we started with a much higher base rate than these other countries, but if you think about the size of the populations there, the number of people who are going to become diabetic in the next twenty-five years is really very frightening.

现在,当然这里存在着分母的问题,我国的增长基数比其他国家要大得多,因为一旦考虑到人口总量,在未来25年成为糖尿病人的人数,就非常非常的惊人了

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

The correct complement is made because of these principles of Watson-Crick base pairing that we talked about before.

剪接配对的正确性源自,沃森克里克碱基互补配对原则的作用,这我们讲过的

耶鲁公开课 - 生物医学工程探索课程节选

These will naturally want to reform and they'll want to reform to re-establish this base pairing.

它们会自然地重新进行碱基配对

耶鲁公开课 - 生物医学工程探索课程节选

Translation occurs by a special kind of polymerization where these transfer RNA's operate by Watson-Crick base pairing.

翻译过程是一种特殊的聚合过程,当tRNA按照,沃森克里克碱基互补配对原则进行配对

耶鲁公开课 - 生物医学工程探索课程节选

Well you do that by this Watson-Crick base pairing, so I know if I have I know what messenger RNA to make from that because I have to satisfy these base pairing rules.

依据的是沃森克里克碱基互补配对原则,如果给我一个ACGCGA的序列,就能知道转录出的mRNA会是什么,因为我必须满足碱基配对原则

耶鲁公开课 - 生物医学工程探索课程节选

The native structure is this double stranded structure here and if I heat it up slightly and I add some base, so under slightly basic conditions, these molecules will fall apart because you've created conditions where the hydrogen bonding is no longer favorable so they peel apart.

原始结构,在这里就是指DNA双链,如果我稍微加热,并且加入一些碱,在弱碱性的条件下,这些配对碱基会分开,这是因为在一定条件下,碱基对之间的氢键,不再稳定并且会断裂分开

耶鲁公开课 - 生物医学工程探索课程节选