不同的和弦成为各种细胞类型，必须完美弹奏所有的音符，才能制造出一个健康的人。

Different chords become the various cell types, and all the notes have to be played perfectly to produce a healthy human being.

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胚胎是从一个完美对称的单细胞开始的。

A new embryo starts as a single cell with perfect symmetry.

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因此，解决这个问题的最好方法之一，只有利用微生物了。微生物就是一座座完美无缺的微型工厂，如果经过合理设计，所有的化学反应过程都可以在微生物细胞内进行。

One of the best solutions to the drawbacks, therefore, seems to be microbes, which are perfect little factories because they can be engineered to perform practically any chemical reaction.

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When I talked about mitosis, I talked about cells making perfect copies of each other, so each parent cell becoming two daughter cells that are the same.

我讲有丝分裂的时候,谈到过细胞能够完美的复制自己,母细胞分裂成为,两个完全一样的子细胞

耶鲁公开课 - 生物医学工程探索课程节选