Definition: used after a preposition to show what thing is being referred to Level: B2
那是她唱歌的那部电影吗？
Is that the film in ___which she sings?
他儿子的去世是他从未完全恢复的经历。
The death of his son was an experience from ___which he never fully recovered.
这不是我投入大量思考的主题。
It isn't a subject to ___which I devote a great deal of thought.
