It is common knowledge that swimming is one of the best forms of exercise.

游泳是最好的运动之一是普遍常识。

It's common knowledge that smoking and cancer are closely linked.

众所周知，吸烟和癌症是密切相关的。

It is common knowledge that travel can broaden our horizon and enrich our life.

众所周知，旅行可以开阔我们的视野，丰富我们的生活。

It is common knowledge that Zhang Zoulin was murdered by the Japanese.

尽人皆知，张作霖是被日本人谋杀的。

His prejudices were common knowledge.

他的偏见是众所周知的。