that is to say
成語所屬單字say
that is to say — 慣用語
1. used to introduce a clearer or more detailed explanation of what you have just s
1.慣用語
釋義
也就是說
used to introduce a clearer or more detailed explanation of what you have just said.
例句
We need to leave on Friday — that is to say, two days from now.
The project was a failure; that is to say, it did not meet any of its goals.