商务英语：今日热词——努力 

污点（名词）

(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.

这位雄心勃勃的高管拒绝承认他的前公司倒闭是个污点，他正渴望开始新的商业冒险。

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.

经过了整个周末没日没夜的工作，这位年轻的营销总监终于努力在我们周一的晨会上做了一个精彩的演讲。