1.(certain)确信的；有把握的
Are you sure?你确定吗？
I'm not sure.我没把握。
How could he be so sure?他怎么能如此确信呢？
2.to be sure of sth
(confident of getting something)确定会…；无疑会…；对…有信心
They're sure of success.他们确信能够成功。
3.to be sure to do sth
(bound to happen)必定会做某事；一定会做某事
I'm sure to forget.我一定会忘记。
Public disgrace and infamy would be sure to follow.当众受辱和声名狼藉肯定会接踵而至。
4.(reliable)+ way, method, remedy可靠的；稳妥的
His aching shoulder was a sure sign of rain.他肩膀疼痛, 这预示着肯定要下雨。
She has a sure grasp of social issues.她对社会问题的把握很准确。
5.(steady)+ aim, footing稳的；稳健的；稳定的
These shoes provide surer footing and greater confidence.这双鞋穿着更稳当, 让人看起来更自信。
6.to be sure
(introducing apparent contradiction)诚然；固然；无可否认
Parents make the rules. To be sure, many of the rules are no longer appropriate today.家长会制定规矩。当然, 有很多规矩今天看来已经不合适。