题目内容：

翻译：it is not as easy to tell an animal from a plant as it is to tell which is earth and which is sky.

优质解答

as作方式状语从句,表示：正如...一样
方式状语从句 as,just as “如…”“正如…一样”Do just as you like
本句意思是：区分动物与植物这件事不象区分什么是天与什么是地那么简单.
意译：区分动物与植物不是件容易的事,比区分天地要困难.