n.大家都知道的事，常识...

common knowledge的音标：common knowledge的英式发音音标为：['kɔmən 'nɔlidʒ]common knowledge的美式发音音标为：['kɑmən 'nɑlɪdʒ]...

It's pointlessly trying to keep your friendship secret — it's common knowledge already.你们无须将友情保密——其实已尽人皆知.It is common knowledge that the earth is round.地球是圆的是常识.It is common knowledge that swimming is one of t...