一定

他们发行一定数量的可公开交易的股票。

They issue a fixed number of shares that trade publicly

学习、工作都有一定的时间。

There are fixed times for study and for work .

一定要确保所有的门都锁好了再走。

See that all the doors are locked before you leave .

我认为他一定是疯了，你说是不是？

I think he must be cracked , don 't you ?

这项工作必须在一定期限内完成。

The work must be completed within a certain time limit .

你一定要仔细看清他们的面孔。

Make sure you get a good look at their faces .

你一定不会以为出了这事是我的责任吧？

Surely you don 't think I was responsible for this ?

别挂断电话——我们一定得谈谈！

Don 't hang up on me ─ we must talk !

走到车那里一定足足有100米呀！

It must be all of 100 metres to the car !

一定要找个宽敞地儿坐得舒服一点。

Make sure you have plenty of room to sit comfortably .

一定要给你的照相机投保，以防丢失或损坏。

Make sure you insure your camera against loss or damage .

她当时踩的树枝一定是突然折断了。

The branch she was standing on must have snapped off .

我并不一定非要去，对吧？

I don 't really need to go , do I ?

我觉得我们一定是在什么地方拐错了路。

I think we must have taken a wrong turning somewhere .

这些任务必须按一定次序去执行。

The tasks had to be performed in a particular sequence .

我一定会时刻睁大眼睛提防他的行为。

I shall certainly keep a beady eye on his behaviour .

蹲下！一定不要让人看见你。

Keep down ! You mustn 't let anyone see you .

这匹马明天比赛一定能赢。

This horse is a dead cert for the race tomorrow .

一定要在支票上签了名再封信封。

Make sure you 've signed the cheque before sealing the envelope .

丢了工作不一定就是大难临头。

Losing your job doesn 't have to be such a disaster .

看！这一定是布拉德∙皮特！

Look ! I 'm sure that 's Brad Pitt !

我觉得你一定是把我错当成别人了。

I think you must be mixing me up with someone else .

面试前一定要用心掌握公司的情况。

Make sure you swot up on the company before the interview .

政府重申一定要查个水落石出。

The government reiterated its resolve to uncover the truth .

在购买食物时，你有一定的法定权利。

When you buy foods you have certain statutory rights .

我以为他是她丈夫——我一定是误会了。

I thought he was her husband ─ I must have misunderstood .

假如你改变主意的话，一定要告诉我。

If you should change your mind , do let me know .

处理爆炸品一定要慎之又慎。

The utmost caution must be exercised when handling explosives .

你一定认识他——他是这一带的知名人士！

You must know him ─ he 's an institution around here !

你为什么一定要我们今晚离开？

Why are you so insistent that we leave tonight ?