记忆方法
将“harmless”拆分为“harm”和“less”，记忆方法为：想象一个物体或者人没有“harm”（伤害），所以它是“less”（更少或无）的。这种方法通过联想其反义概念来帮助记忆。
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英语词源
- harmless (adj.)
- c. 1300, "uninjured," from harm (n.) + -less. Meaning "without power or disposition to harm" is from 1530s. Related: Harmlessly; harmlessness.
权威例句
- 1. Industry has been working at developing harmless substitutes for these gases.
- 该行业一直在努力开发一些可以替代这些气体的无害物质。
- 2. Johnny was the most persistent and most harmless of her admirers.
- 约翰尼是追她的人中最痴心、最没有心机的一个。
- 3. I would not want to deny them a harmless pleasure.
- 我不想剥夺他们这点无伤大雅的乐趣。
- 4. These reactive mole-cules are mopped up and made harmless by Vitamin E.
- 这些活性分子已被维生素E灭活，没有害处了。
- 5. He seemed harmless enough.
- 他看起来不会惹什么麻烦。