Where the tiller is tireless the land is fertile. 人勤地不懒。
He is diligent and always keeps his house clean and tidy. 他这个人手勤,屋子收拾得非常干净。
Clothes should be changed and washed regularly. 衣服要勤洗勤换。
Rains are frequent here in spring. 这儿春季雨水勤。
ground service [duty]; 地勤
air duty; 空勤
check on work attendance; 考勤
absence from work; 缺勤
Qin Zeng 勤曾
牛津高阶第八版
美国韦氏词典
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维基百科 (自由的百科全书)