题目内容：

by which time和by the time 区别
两个都能引导从句,有什么不同

优质解答

I didn't get to the station until about 9:30,by which time the train had already left.The train had already left by the time I got to the station.从上面例句可以看到by which time 需要一个具体的/特定的...