单词：chemical bonds
chemical bonds的用法和样例：
例句
- In a more complex one-step reaction, bonds both form and break.在较复杂的一步反应里，既有化学键的形成，也有化学键的断开。
- Fiber reactive dyes are from true chemical bounds between dyestuff and fiber.纤维活性染料来源于染料与纤维之间形成的真正化学键。
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