| 单词 | 干些正经事 |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔faff about/around〕I wish you'd stop faffing about and do something useful! 我希望你别再瞎忙活，干些正经事！剑桥高阶〔knuckle down〕The only thing to do was knuckle down and get on with some serious hard work.唯一要做的事就是开始努力工作, 干些正经事。外研社新世纪 |
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