It is common knowledge that… 众所周知，……

　　例：It is common knowledge now that Chinese people are very intelligent.

　　译文：众所周知，中国人和很聪明。

　　It occurs to sb. that… (某人) 想起……

　　例1: It occurred to me suddenly that I had met him somewhere.

　　译文：我突然想起在什么地方见过他。

　　例2: It occurred to me that she was jealous of me.

　　译文：我突然发觉她嫉妒我。