每日商務英語 第326期:努力（非正式）

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to knock oneself out努力（非正式）

英文釋義
To work very hard to accomplish something; to make a strenuous effort.

例句
Working all weekend, day and night, the young marketing director really knocked himself out to make an impressive presentation at our meeting Monday morning.

經過了整個週末沒日沒夜的工作，這位年輕的營銷總監終於努力在我們週一的晨會上做了一個精彩的演講。