exe イディオム

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exempt from

make free from免除
Old age pensioners should be exempt from taxation．领取养老金的人应免除征税。
Being very small can exempt a man from military service. 年岁很小可以免除服兵役。

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Judge, jury and executioner

If someone is said to be the judge, jury, and executioner, it means they are in charge of every decision made, and they have the power to be rid of whomever they choose.

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exert oneself|exert

v. phr. To make an effort; try hard; work hard. Susan exerted herself all year to earn good marks. Jerry exerted himself to please the new girl.

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exert oneself

exert oneself
Put oneself to strenuous effort, as in We exerted ourselves mightily to raise funds. [First half of 1700s]