divalent + noun
Divalent ions are important in biological systems.
二价离子在生物系统中很重要。
具有2原子价的；具有2疫苗价的；二价的；[医] 二价的
In chemistry, having a valence of two.
用于化学，指化合价为二
具有2原子价的
Having an atomic valence of 2.
具有2疫苗价的
Having a vaccine valence of 2.
In chemistry, a divalent atom can form two chemical bonds.
在化学中，一个二价原子可以形成两个化学键。
用法提示：这里 divalent 修饰 atom，表示原子化合价为二。
The divalent calcium ion plays a crucial role in bone formation.
二价钙离子在骨骼形成中起着关键作用。
用法提示：divalent 修饰 ion，指带两个正电荷的离子。
Divalent metals like magnesium are often used in alloy production.
像镁这样的二价金属常用于合金生产。
用法提示：divalent 修饰 metals，表示金属化合价为二。
Divalent ions are important in biological systems.
二价离子在生物系统中很重要。
This metal is divalent.
这种金属是二价的。
含义重叠但在生物学有特定用法；在化学可互换，但生物学中不可互换
指共用电子对的化学键，而非氧化态为二
mono-（一）+ valent（价的）
tri-（三）+ valent（价的）
tetra-（四）+ valent（价的）
penta-（五）+ valent（价的）
poly-（多）+ valent（价的）
val-（力量/价值）+ -ence（名词后缀）
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