也就是说: in other wordsnamely = that is (to say)that is to sayvidelicet
换句话说: in other words; say sth. in other words; that is to say 短语和例子从今天起两星期后, 换句话说, 即3月1日 two weeks from today, in other words, the 1st of march; 他没有去, 换句话说, 他去的这个事实无案可查。 he didn't go, that is to