by the time
01
到...时候, 当...时
used to indicate a point in time before which an action or event has occurred or will occur
例子
By the time she finishes her degree, she will have learned a lot.
到她完成学位的时候，她会学到很多东西。
By the time they reached the theater, the movie had already started.
等到他们到达剧院时，电影已经开始了。
