140 onset
基础篇：meaning: the beginning of something, especially something bad
进阶篇：onset 是名词，意思是开始, 常常可以用来完美替换常见的“ beginning,” 是外刊中经常出现的表达。onset 表示“开始”时，后面常接有负面含义的名词，比如疾病，经济萧条、战争等。
战争开始后，犯罪率激增，就可以说成：
Since the onset of the war, the crime rate has skyrocketed.
有证据表明，会说一门外语有助于推迟老年性痴呆（dementia）。我们就可以用onset 造句
Evidence shows that speaking a second language can help delay the onset of dementia.
《经济学人》用例
The study adds substantial weight to the evidence linking psychosis. to the onset of psychosis.
应用篇
1）翻译：经济危机爆发后，投资面貌发生了巨大变化。
The investment landscape has been changed tremendously since the onset of the financial crisis.
2) 造句：情境: 雨季大雨，天气糟糕。
Yesterday's rain was the worst since the onset of the rain season.
