So there are certain facts about the digestive tract such that if you think about them you can't do something, kiss the person.

所以有某些关于消化道的事实,如果你考虑了它们，你就不能做某件事了，亲吻别人。

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The respiratory system, for example, the renal system, the digestive system, these are examples - three examples of organ systems that contact the external environment.

例如,呼吸系统,泌尿系统,消化系统,这些系统,这三个系统,与外环境相联系

耶鲁公开课 - 生物医学工程探索课程节选

They're certain facts about the nature of Peggy Sue's digestive system.

那是某些关于Peggy，Sue消化系统本质的事实。

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We've talked about the interesting way in which the digestive system contacts the external environment.

我们会讲到,消化系统与外环境之间十分有趣的联系

耶鲁公开课 - 生物医学工程探索课程节选

The digestive system, of course, is responsible for bringing in sort of fresh nutrients, fresh substrates for cellular metabolism, fresh quantities of amino acids, and nucleotides, and the things that we can't generate internally.

当然,还有消化系统,它主要负责将各种新鲜营养物摄入体内,为细胞代谢提供新的底物,如一批新的氨基酸,核苷酸,以及那些人体无法自行合成的东西

耶鲁公开课 - 生物医学工程探索课程节选

Now, well, you're making out after having had dinner, and while you're sitting there making out, food is making its way down Peggy Sue's digestive tract, being turned into shit.

现在，你们在吃完饭后亲热，当你们坐下来亲热时，食物正沿着Peggy，Sue的消化道向下走，正要变成大便。

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