a chemical bond in which one atom loses an electron to form a positive ion and the other atom gains an electron to form a negative ion
双语例句
Aminoin chitosan and carboxy on the surface of fiber form strong ionic linkage. 壳聚糖的氨基同纤维表面的羧基形成了牢固的离子键结合。
"A sweet temper" is a figurative expression, but "sweet coffee" is not. "甜蜜的性情"是个比喻的说法，而"甜咖啡"则不是。
Depending on electron distributions resulting from covalent or ionic bonding of structural sub-groups,proteins can be either polar or nonpolar at a given pH. 取决于其电子分布会产生共价或离子结合的结构次团，在特定的氢离子指数下，蛋白可以是极性或非极性。
