记忆方法
将“harmful”拆分为“harm”（伤害）加上“ful”后缀，意味着充满或满是伤害的。想象有害的事物就像一个充满了伤害的小恶魔，这样可以帮助记住这个单词的含义。
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英语词源
- harmful (adj.)
- mid-14c., from harm (n.) + -ful. Related: Harmfully. Old English had hearmful but the modern word probably is a Middle English formation.
权威例句
- 1. Such laws could protect the consumer from harmful or dangerous remedies.
- 这样的法规可以保护消费者免受有害或者危险药品的威胁。
- 2. Polyunsaturated oils are essential for health. Excess is harmful, however.
- 多不饱和油对健康很重要。但是，食用过量就会有害。
- 3. Whatever is hidden is harmful (hence revelation equals security).
- 任何隐藏的东西都是有害的（所以披露就等于安全）。
- 4. It's believed the affair was potentially harmful to British aviation.
- 据信该事件可能对英国航空业造成不利影响。
- 5. Radon is known to be harmful to humans in large quantities.
- 众所周知，大量的氡会对人体造成伤害。