1. be sure of : 确信..., 对...有把握；
2. sure enough : 果然；
3. for sure : 确实；
4. make sure : 确定；
5. be sure of oneself : 有自信心；
6. to be sure : 诚然；
形容词
副词
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秘密
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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.
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.
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.
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.