his skin was very fair and he to an unusual degree wore his hair quite long.

他的皮肤非常白皙,他还不同寻常地留着很长的头发。

耶鲁公开课 - 弥尔顿课程节选

But skin cells and brain cells and pancreas cells aren't doing the same things.

但皮肤细胞,脑细胞和胰腺细胞,却发挥着完全不同的作用

耶鲁公开课 - 生物医学工程探索课程节选