That creates a problem in the genetic code in that there's 64 possible sequences but there's only 20 some amino acids, so each amino acid can be specified by more than one codon.

这里有个问题,遗传密码有六十四种可能的序列,而只有二十种氨基酸,因此每种氨基酸都有,不止一种密码子与之对应

耶鲁公开课 - 生物医学工程探索课程节选

Now what I'd like to do is something that you'll probably cut out because of copyright issues but it's a kind of fun warm-up anyway, so we're going to go ahead and do this and then we'll actually start.

首先我想做个小游戏,不过这个片段可能由于版权问题而被切掉,但是这个热场游戏很有趣,那么,我们马上开始,游戏之后再正式上课

耶鲁公开课 - 聆听音乐课程节选