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
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。
