记忆方法
将“onset”拆分为“on”和“set”。想象“on”像开关，而“set”是设定或开始。结合这两个部分，想象这个开关“on”开启了“set”开始的状态，这样就可以记住“onset”意味着开始或发作。
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中文词源
onset 开端，开始
on,在上，向上，set,开始。
英语词源
- onset (n.)
- 1530s, "attack, assault," from on + set (n.); compare verbal phrase to set (something) on (someone). Weaker sense of "beginning, start" first recorded 1560s. Figurative use in reference to a calamity, disease, etc. is from 1580s.
权威例句
- 1. The sudden onset of winter caused havoc with rail and air transport.
- 冬天的突然降临让铁路和航空运输系统陷入混乱。
- 2. Most of the passes have been closed with the onset of winter.
- 冬天来临，大部分关口均已关闭。
- 3. The drug must be taken from the onset of the infection.
- 这种药必须在感染的最初期就开始服用.
- 4. The onset of depression often follows a traumatic event.
- 抑郁症发作常常发生在遭受创伤之后.
- 5. His first hit record marked the onset of an astonishing career.
- 他的第一张风行一时的唱片标志着惊人事业的开始.
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