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.

辞典例句

The study and progress of main - chained, side - chained polymer , combined and net polymer crystal are mainly reviewed.

着重介绍了主链型 、 侧链型 、 组合型以及网络状等类型的氢键型液晶高分子的研究现状及其进展.

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