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1、毋庸置疑 beyond all doubt; allow of no doubt; be undisputed [undoubted]; not have the slightest doubt; It goes without saying that...; It is indisputable that...; There is no room for doubt that...; without (a) doubtbeyond questionout of question crystal clear完全透明的；[喻]极其明白。

2、十分清楚。

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