This is the 895th most frequent Chinese word.
曾经
"Once" or "previously."
In this sentence, "曾经" is used to denote an action that occurred in the past. It indicates a past experience or event.
我曾经去过北京旅行。
I have been to Beijing for a trip before.
In this context, "曾经" signifies a past situation or activity, highlighting shared past experiences.
我们曾经在学校里一起学习。
We once studied together in school.
Here, "曾经" is applied to describe a past state or condition that no longer holds true in the present.