that is to say
01
也就是说, 换言之
used to introduce an explanation or clarification of a point just made
Collocation
例子
The project must be completed by the end of the month, that is to say, within the next two weeks.
该项目必须在月底前完成，也就是说，在接下来的两周内。
He enjoys outdoor activities, such as hiking and camping — that is to say, he prefers to spend time in nature.
他喜欢户外活动，比如徒步和露营——也就是说，他更喜欢在大自然中度过时光。
