众所周知，气候正在变暖，我们必须采取行动。

Zhòngsuǒzhōuzhī, qìhòu zhèngzài biànnuǎn, wǒmen bìxū cǎiqǔ xíngdòng.

As everyone knows, the climate is warming, and we must take action.

众所周知，中国的美食非常丰富多样。

Zhòngsuǒzhōuzhī, Zhōngguó de měishí fēicháng fēngfù duōyàng.

As everyone knows, Chinese cuisine is extremely rich and diverse.

众所周知，他是这个领域最有经验的专家之一。

Zhòngsuǒzhōuzhī, tā shì zhè gè lǐngyù zuì yǒu jīngyàn de zhuānjiā zhīyī.

It is well known that he is one of the most experienced experts in this field.