众所周知,他曾在监狱里待过。
It's ___common ___knowledge that he spent time in jail.
众所周知,这种大众媒体的关注不可避免地影响家庭关系。
It is ___common ___knowledge that such attention in the mass-media inevitably tells on relationships in the family.
吸烟有害健康是众所周知的事情。
That smoking is harmful to health is ___common ___knowledge.