perturb
v.使焦虑；使不安
音标：
/pə'tɜːb/
英英释义：
If something perturbs you, it worries you quite a lot.
例句：
What perturbs me is that magazine articles are so much shorter nowadays.
让我不安的是现在杂志文章都短多了。
Matt Haig的新书 The Midnight Library 也出现了这个表达：
cash in （on）
利用;从中牟利;从…中捞好处
英文释义：
If you say that someone cashes in on a situation, you are criticizing them for using it to gain an advantage, often in an unfair or dishonest way.
例句：
①Residents said local gang leaders had cashed in on the violence to seize valuable land.
居民们说，当地的帮派头子用暴力夺取宝贵的土地。
②He said that public servants should use government to serve and not to cash in .
他说，公务员应该运用政府权力为民服务，而不是从中捞取好处。
《经济学人》一篇题为 Terminal value 的文章也出现了这个表达：
这里要补充一点，“cash in ”也可以表示“将(保险单等)兑现 ”【If you cash in something such as an insurance policy, you exchange it for money.】
举个栗子：
He did not cash in his shares.
他没有把股票兑换成现款。
