立彬の日本語
765--[tbd]
こつこつ働く, コツコツ働く, こつこつはたらく, コツコツはたらく
1. to work hard, to toil, to moil, to keep one's nose to the grindstone, to slug away
努力工作,辛勤劳作,埋头苦干,脚踏实地,兢兢业业
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