the bus by which he goes to school every day is a red one

By bus就是你要用这个交通工具In the bus,就是在车里面,也就是在坐车的意思On the bus,用的不多,直译好像坐在车顶上一样,不合情理而且原句个人认为没有必要加 by直接说 the bus that he used to go to school everyday is red。就好。