一定

You must have noticed how tired he sometimes looks.

你一定注意到他有时候显得特别疲惫。

Make a point of backing up your files at regular intervals.

一定要定期备份文件。

Over the years he's demonstrated a certain prescience in foreign affairs.

这些年来，他已经在外交事务方面表现出一定的预见性。

The happiest are not those who own all the best things, but those who can appreciate the beauty of life.

最幸福的人们并不一定什么都是最好，只是他们懂得欣赏生活的美好。

Now sit down and make yourself comfortable. You must be very tired.

现在坐下来，让自己舒服些，你一定很累了。

"You must come to Tinsley's graduation party." — "I'd be delighted."

“你一定要来参加廷斯利的毕业聚会。”——“我很乐意。”

He must have been aware that my parents' marriage was breaking up.

他一定已经知道我父母的婚姻即将破裂。

"His memory must be completely back, then?" — "Just about."

“这么说，他的记忆一定是完全恢复了？”——“差不多。”

The enemy must be digging themselves in now ready for the attack.

敌人现在一定在挖掩体，准备迎接进攻。

There must be any number of people in my position.

一定有很多人处在我这种境况。

"You must be expecting a young man," she teased.

“你一定是在等哪位小伙子吧，”她揶揄道。

Something must have gone wrong with the satellite link.

卫星连接一定出了毛病。

The result reflects a modest rightward shift in opinion.

结果显示舆论出现一定程度的右倾。

They issue a fixed number of shares that trade publicly.

他们发行一定数量的可公开交易的股票。

Make sure the draining board, sink and plug hole are regularly disinfected.

滴水板、水槽和塞孔一定要定期消毒。