必须专一用英语怎么写

You have to be specific

必须───must;专一───Single mindedness

The realisation that the murderer must have been a close friend came as a shock.───意识到杀人凶手一定是个密友,大家都很震惊.

We must set realistic goals.───我们必须制订可实现的目标。

Only a few students passed the exam, so you can see that the paper must have been extremely stiff.───只有几个学生通过了考试, 可见考题是很难的.

I can't explain such a statement by him on the basis of logic. He must have blown his top.───我从逻辑推理方面解释不了他讲的这番话,他想必是神经错乱了.

He must have picked up a cold — he's begun to snuffle.───他开始鼻塞,一定是感冒了.

No mathematician is infallible; he may make mistakes, but he must not hedge.───没有一位数学家是一贯正确的; 他可能会犯错误, 但他绝不会回避任何一个问题.

She asked the nurse how long her agony must last.───她问护士,她的极端痛苦要延续多久.

We must never permit anything of the sort.───我们绝不允许存在这样的情况.

If you want knwledge, you must toil for it.

A full cup must be carried steadily.

We must stock up for the winter.

He that will thrive must rise at five.

Desperate diseases must have desperate cures.