covalent例句
In
covalent bonding, atoms share electrons.
在共价键联中, 原子共有电子.
Crystals may be classified as either ionic or
covalent by analogy with molecules.
与分子的情况一样,晶体也可以分为离子键型和共价键型.
Ceramics primarily have ionic bonds, but
covalent bonding is also present.
陶瓷初始状态是受离子束缚的, 但是还是有共价键结构的.