In turn, they supply their little helpers with shelter and inorganic compounds.

作，们这些小助手们提供庇护所和化合物。

Plants, meanwhile, are autotrophs, or producers: they can synthesize their own fuel from sunlight, CO2, and other inorganic compounds.

植物，与此同时，作“自养生物”，抑或是“生产者”：们可以通过合成阳光，二氧化碳自己提供能量，及其化合物。

I don't remember exactly the reaction he used to make urea, but he made it from effectively things you would think of as rocks, like inorganic compounds that never came from a living thing to begin with.

我不太记得用来制造尿素的具体反应了，但是从一些你可以认是岩石的东西中制得的，比如那些原本就不是来自生物的化合物。