路易斯和布鲁克斯认为，当儿童不借助于观察偶然行为，也能通过视觉认出自己时，他们就达到了发育的一个重要里程碑。

Lewis and Brooks argued that an important developmental milestone is reached when children become able to recognize themselves visually without the support of seeing contingent movement.

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即使是前肢发育不全的羽毛也能扩大手臂的表面积，以略微提高升力。

Even rudimentary feathers on forelimbs could have expanded the arm's surface area to enhance lift slightly.

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REM睡眠是大脑发育的关键动力，它甚至能改造大脑。

REM sleep is a critical driver of brain development, and literally rebuilds the brain.

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What I want you to remember now is that abundant cell proliferation takes place during development.

这节课我希望你能记住,发育过程中伴有大量的细胞增殖过程

耶鲁公开课 - 生物医学工程探索课程节选