在大自然中，有的鱼以死鱼为食。

Some fish scavenge on dead fish in the wild.

《牛津词典》

蝴蝶以园林中草木的花为食。

Butterflies feed on the flowers of garden plants.

《牛津词典》

他以蔬菜为食。

He feeds on vegetable diet.

youdao

And indeed, it's expressly stated by God that Humans are to be given every fruit bearing tree and seed bearing plant, fruits and grains for food.

而上帝也确实这样表述过,人们能拥有所有结果的树，结籽的植物，以果实和稻谷为食。

耶鲁公开课 - 旧约导论课程节选

That's what you are going to eat.

你们将以这些为食。

耶鲁公开课 - 旧约导论课程节选