bivalent

In this compound, oxygen is bivalent, so it can combine with two hydrogen atoms.

用法提示：bivalent 在此作表语形容词，表示‘二价的’（化合价为二）。

The bivalent metal reacted with the acid to produce a salt.

用法提示：bivalent 作前置定语修饰 metal，意为‘二价的’。)

Bivalent ions such as magnesium play a vital role in enzyme function.

用法提示：bivalent 作前置定语修饰 ions，指‘二价的’离子。