sure 英[ʃʊə(r)] 美[ʃʊr]
adj. 确信的，确实的; 有把握的; 无疑的; 一定的;
adv. 当然; 确实地; 无疑地;
[例句]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。
[其他] 比较级：surer 最高级：surest
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