Plummet: to fall suddenly and quickly from a high level or position 暴跌;速降
Share prices plummeted to an all-time low. 股票价格暴跌到历史最低点.
Her spirits plummeted at the thought of meeting him again. 一想到又要见到他,她的心情便直往下沉.
The jet plummeted into a row of houses. 那架喷气式飞机一头栽进一排房子里.

Mitigate: to make something less harmful, serious, etc. 减轻;缓和
action to mitigate poverty 减轻贫穷的行动
Soil erosion was mitigated by the planting of trees. 植树造林减轻了土壤侵蚀.

Take off: (of an idea, a product, etc. 观念、产品等) to become successful or popular very quickly or suddenly 突然大受欢迎;迅速流行
The new magazine has really taken off. 这份新杂志真是大受欢迎.
Her singing career took off after her TV appearance. 她在电视上亮相后歌唱事业迅速起飞.

Shoot up: to rise suddenly by a large amount 陡增;猛涨;迅速上升
Ticket prices shot up last year. 去年票价猛涨.

来源:恒星英语-口语频道
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