Pitfall traps are used to catch small crawling insects and animals.

陷阱用来捕捉爬行的小昆虫和动物。

Pitfall traps that lure them in with sweet smells only to trap them inside.

水桶式陷阱会用甜美的气味引诱虫子进来，把它们困在里面。

Pitfall traps are the standard passive trap used  by things like pitcher plants and bromeliads.

陷阱是猪笼草和凤梨科动物使用的标准被动陷阱。

Pitfall traps are the standard passive trap used by things like pitcher plants and bromeliads.

陷阱陷阱是 猪笼草和凤梨科植物使用的标准被动陷阱。