Because only atomic hydrogen has that set of lines which means I could then take the spectra of gas phase species and use that information to identify.

我在这抬头看看然后离开，那就是氢原子,那就意味着,我可以测定,气相种类的光谱并且运用那个信息来鉴定。

麻省理工公开课 - 固态化学导论课程节选

And much easier to purify and know what you have at the end, than if you're trying to harvest it from a whole complex organism.

最终产品的纯化和鉴定也比,从复杂的生物体上提取和鉴定容易

耶鲁公开课 - 生物医学工程探索课程节选

The genome starts piling on mutations that mean nothing; that's how they date the branches of the genome, by looking at the number of neutral mutations.

基因积累了许多无意义的突变,这就是他们如何鉴定基因分支的年代,看中性突变的数量就行了

耶鲁公开课 - 金融市场课程节选

They had to get that all worked out, it had to be done accurately, and they had to decide to keep a certain amount of co-insurance.

他们得鉴定所有的东西，还得认真准确，而且他们还得决定是否,要进行一定程度的共保。

耶鲁公开课 - 金融市场课程节选

They had to work on that, they had to devise-- they had to get an appraisal industry that could appraise houses and get some idea of what they're really worth.

他们得做些工作，他们要设计出-,他们不得不借助于评估机构,以便于鉴定房屋情况，并且得知一些,其真实价值的参考意见。

耶鲁公开课 - 金融市场课程节选

You can use PCR for fingerprinting as well, for looking in some unknown fluid for example, is a gene that I'm interested in there?

也可以用PCR做生物指纹鉴定,比如在一个未知溶液样本中,里面是不是有我感兴趣的那段基因呢

耶鲁公开课 - 生物医学工程探索课程节选

You could use PCR to do that because if you amplify a gene in PCR, that gene had to be present from the beginning.

你可以用PCR技术来鉴定,因为如果你能用PCR扩增某一段基因,说明它从一开始就肯定是存在的

耶鲁公开课 - 生物医学工程探索课程节选