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- 他整天没有正经事儿。 He has no serious affairs all day.
- 正经 (adj) decent; proper
- 正经的 nononsense
- 假正经 prudery
- 我没想到这事儿还是真难办? I didn't expect it to be so difficult.
- 不正经的 light-minded
- 这人出什么事儿了吗? Is anything the matter with the man?
- 这事儿千万不可掉以轻心。 We must under no circumstances take this lightly.
- 约翰常常逗人笑，因此要想知道何时他是正经就很困难了。 John often plays the fool so it is difficult to know when to take him seriously.
- 杂事儿 miscellaneous affairs
- 洗窗子不是我的事儿 Washing the windows is not my job.
- 一周来我们没有吃过一顿正经饭。 We haven't had a square meal for a week.
- 他就喜欢在小事儿上操心。 It's difficult for him not to niggle.
- 说正经的,我们得立即开始工作。 All joking apart, we should set to work immediately.
- 这事儿我在心就是了。 I'll keep an eye on the matter.
- 我喜欢有将来（有前途）的男人和有过去（不正经）的女人。 I like men who have a future and women who have a past.
- 他对出纳说，他没什么事儿，只是在等一个他认识的人。 He told the cashier that he didn't want anything; he was just waiting for a man he knew.
- 一顿正经饭 a square meal
- 她多事儿没有? Did she put her foot into it?
- 别那么没正经的。 Don't be facetious.
