污點（名詞）

(noun) A mark of disgrace.

EXAMPLE: The ambitious executive refuses to believe that the failures of his previous companies was a stigma, and he is eagerly starting a new commercial venture.

這位雄心勃勃的高管拒絕承認他的前公司倒閉是個污點，他正渴望開始新的商業(yè)冒險。

to knock oneself out

努力（非正式）

(INFORMAL) To work very hard to accomplish something; to make a strenuous effort.

EXAMPLE: 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(jīng)過了整個周末沒日沒夜的工作，這位年輕的營銷總監(jiān)終于努力在我們周一的晨會上做了一個精彩的演講。