例：It goes without saying that in order to speak good English, we must first of all learn good pronunciation.
译文：不言而喻，为了讲好英语，首先必须学好发音。
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。
