You want to use complex, compound and simple sentences when you write these essays.

当你写这些作文时，你想使用复杂、复合和简单句。

Earlier, the same team confirmed that Enceladus' ice grains are rich in minerals and complex organic compounds.

早些时候，同一个小组证实了土卫二的冰粒富含矿物质和复杂的有机化合物。

There, the particles gathered ice and carbon, which in the presence of heat and light, reacted to form the complex organic compounds.

在那里，颗粒聚集了冰和碳，它们在热和光的存在下发生反应，形成复杂的有机化合物。