Because of that you can't count on molecules moving rapidly over the size of a cell that's ten to 30 Microns in diameter.

因此不要对生物大分子能在,直径十到三十微米的,细胞里高速穿行抱有任何指望

耶鲁公开课 - 生物医学工程探索课程节选

You don't have to count all the leaves on the tree, you can take a sample and you count that and then you multiply.

你不必数树上所有的叶子,你可以抽样,然后计数,再相乘即可

耶鲁公开课 - 金融市场课程节选