have a perfect right to do somethingused to emphasize that it is reasonable for someone to do something 完全有理由做某事 He has a perfect right to know what’s happening. 他完全有理由了解目前发生的事情。
have a perfect right to do something• They have a perfect right to object to it.• You have a perfect right to say "no" if you don't want to do it.
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