As the caterpillar bites into a vein,a kind of latex swells out engulfing it.毛虫只要咬破叶脉叶子就会流出一种胶乳包住毛虫

bite into咬入；腐蚀

The little girl's tooth came out when she bit into the apple.

这小女孩在咬苹果时，她的牙掉了。

This piece of meat is very tough, and no one has been able to bite into it.

这块肉很硬，谁也咬不动。

the caterpillar drains the leaf of latex and cuts off its supply.让叶片的胶乳流干并阻断其供应

cut off切断

He cut off a bunch of grapes to entertain us.

他剪下一串葡萄招待我们。

A storm that cut off power to the whole region.

切断了整个地区电力供应的暴风雨

the caterpillar eats in safety before preparing to pupate into a butterfly.毛虫可以放心大嚼，然后成蛹化蝶

prepare to准备

We are not prepare to consign the goods.

我们不准备寄售此货。

Are you prepared to submit to my decision?

他准备对我的决定让步吗？