众所周知，他曾在监狱服刑。

It's ___common ___knowledge that he spent time in jail.

众所周知，媒体上的这种关注不可避免地会影响家庭关系。

It is ___common ___knowledge that such attention in the mass media inevitably affects relationships in the family.

地球绕太阳转是常识。

It's ___common ___knowledge that the Earth orbits the Sun.