England must win this game to be sure of qualifying.

英格兰队必须拿下这场比赛才能确保获得资格。

《牛津词典》

England must win this game to be sure of qualifying for the World Cup.

英格兰队必须拿下这场比赛才能确保获得世界杯的参赛资格。

《牛津词典》

We have to be sure of that first.

我们得确信这是第一位的。

youdao

So,if your employer tells you to cut to the chase, be sure to get to the main point of your story quickly.

VOA: special.2010.07.25

To be sure, Machiavelli focuses on key aspects of political reality which are often ignored by thinkers like Plato and Aristotle.

事实上马奇亚维利所专注的,政治现实观点,是其它思想家所常遗漏,像柏拉图和亚里士多德。

耶鲁公开课 - 政治哲学导论课程节选

So, it's perfectly okay to be part of a collaboration, but you've got to make sure that you're pulling your weight.

所以,参与小组讨论是完全允许的,但你要保证你在其中有所作为

耶鲁公开课 - 基础物理课程节选

That means it is possible to be sure of the paternity of a tadpole.

ECONOMIST: Animal behaviour

Chelsea must beat Cluj in their last group game to be sure of qualifying.

BBC: Set-piece leveller upsets Scolari

In contrast, enough is known of Shapley, her last boss, to be sure of his egotism.

ECONOMIST: Twirls and swirls from outer space