He is known to be leal to his friends.

他以对朋友忠诚而闻名。

She is known to be a reliable employee.

她被认为是一个可靠的员工。

The judge is known to be incorruptible.

这位法官以不腐败著称。

He is known to be an unreliable witness.

他被认为是一个不可靠的证人。

Prunes are known to help with digestion.

西梅干有助于消化。

Smoking is known to be hazardous to your health.

吸烟被认为对你的健康是危险的。

Laughter is known to boost endorphin levels.

众所周知，笑可以提高内啡肽水平。

She is known to be mean with her possessions.

她以对自己的财物吝啬而闻名。

Pigs are known to be very intelligent animals.

猪被认为是非常聪明的动物。

He was known to hok people out of their money.

他以哄骗别人钱财而闻名。