英汉词典

1. 确信的;确知的;肯定的;有把握的
    If you are sure that something is true, you are certain that it is true. If you are not sure about something, you do not know for certain what the true situation is.

    e.g. He'd never been in a class before and he was not even sure that he should have been teaching...
           他以前从未教过课，甚至不确定自己该不该教课。
    e.g. The president has never been sure which direction he wanted to go in on this issue...
           总统一直都不确定自己想从哪个方面来着手处理该问题。

2. 一定的;必定的;无疑的;确保的
    If someone is sure of getting something, they will definitely get it or they think they will definitely get it.

sure

    e.g. A lot of people think that it's better to pay for their education so that they can be sure of getting quality...
           许多人认为最好是接受付费教育，这样能确保教学质量。
    e.g. It is the self-assurance of the new generation which makes them sure of their success.
           年轻一代的自信让他们对成功志在必得。

3. (事情的发生)一定，必然
    If you say that something is sure to happen, you are emphasizing your belief that it will happen.

    e.g. With over 80 beaches to choose from, you are sure to find a place to lay your towel...
           有 80 多个海滩可供选择，你一定能找到一处满意的。
    e.g. Anyone who goes food shopping without a list is sure to forget the things they really need.
           任何人如果采购食物时没列清单的话，肯定会忘了真正需要的东西。

4. 不容置疑的;确切的;可靠的;保险的
    Sure is used to emphasize that something such as a sign or ability is reliable or accurate.

    e.g. Sharpe's leg and shoulder began to ache, a sure sign of rain...
           夏普的腿和肩膀开始疼痛，这预示着肯定要下雨了。
    e.g. She has a sure grasp of social issues such as literacy, poverty and child care.
           她对扫盲、贫穷和儿童保育等社会问题都有深切的认识。