2007.12.23 : You ought to keep your mind on what you are doing.
你应当专心致志地做你的工作。
keep one's mind on:continue paying attention to 继续留神；继续专心于
再如:
It's hard to keep your mind on your work with all this noise going on.
这些噪声响个不停，很难使你专心工作。
海纳百川，有容乃大；壁立千仞，无欲则刚。