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Either that you are certain of something, that you are not certain of something,
一种是表达你对某件事情很有把握或者并没有什么把握，
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Then again, if you are not certain of something you can say "I'm not sure."
同样的，如果你对于一件事没有把握，你可以说“I'm not sure.”
应用推荐
$firstVoiceSent
- 来自原声例句