hydrate

The chemist identified the white powder as a hydrate of copper sulfate.

用法提示：名词，指一种含有结晶水的化合物。

Many minerals in nature exist as hydrates with water molecules trapped in their crystal structure.

用法提示：复数形式，表示多类水合物。

When heated, the hydrate releases its water and becomes an anhydrous compound.

用法提示：单数名词，指特定水合物。