I bent down to pick up a book, and I'll be darned if she didn't sneak a look at my derriere.

我当时正弯腰捡书，她要没偷看我的美臀才怪了呢。

A variety of species have evolved eyespot markings that thwart deadly adversaries-some frog derrieres feature eyespots, as do the backends of some fish.

各种各样的物种都进化出了能挫败致命对手的眼斑标记，比如有些青蛙的臀部长出眼斑，就像某些鱼类尾巴上有眼斑一样。