脱口说英语口语校园习语大全

t-17:there's no telling/knowing 说不定

a:don't speak loudly; you'd better behave yourself.
a:别那么大声，你最好放规矩一点。

b:there you go again!
b:你又来了。

a:there's no telling when the teacher will come.
a:说不定老师会来的。

b:it's no big deal!
b：没什么大不了的！

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