切割或切片时用拇指和食指捏住刀刃上方，其他手指顺势握住刀柄。

For cutting and slicing, hold the knife with your thumb and index finger gripping the top of the blade, and wrap your other fingers around the handle.

youdao

把你的拇指或其他手指扎入它的眼睛里。

Stick your thumb or finger into its eye.

youdao

但它们中有许多具有“手性”，也就是说同一物质可以有两种排列方式，就好像四个手指和一个大拇指可以组成左手或右手一样。

But many of them are "chiral", which means the same components can be arranged in two different ways, just as four fingers and thumb can be arranged to make a left hand or a right hand.

youdao