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be sure to do

一定做某事；确定做

1、一定做某事

...fun n. 有趣 funny adj. 有趣的，滑稽的be sure to do 一定做某事，肯定做某事known adj. 有名的，著名的(记住意思) ...

2、一定

... be sorry to do 很抱歉，很遗憾做某事 be sure to do 一定/相信会做某事 be ready to do 准备好做某事，乐于做某事 ...

be sure to do sth一定会做某事;有信心做某事;一定要做某事的

be sure to do something必定做某事

sb be sure to do一定会…的

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