By the time I left the school I had taught that course for ten years.
当我离开学校时，我教那门课已经有十年了。
By the time I got back to school, the bell had rung.
当我回到学校的时候，铃声已响了。
By the time I got to school, the class had already began.
我到校时，已经开始上课了。
By the time the children reach high school, something remarkable has happened.
到这些孩子上高中时，引人注目的事发生了。
At the same time, our School strengthens its own research by means of the MBR.
同时，我们的学校加强了MBR的手段自己的研究。
By the time I left the school I had taught that class for ten years.
到我离开学校的时候为止，我已经教了那个班十年了。
By the time they graduate from the guide dog school, they can read each other's every movement.
的时候，他们毕业指南狗学校，他们可以看到对方的每个动作。
By the time I _________to school, the bell ___________.
当我返回学校时，上课铃已响了。
By the time I left the school, he had taught the class for 3 years.
到我毕业时，他已经教那个班三年了。
By the time I left the school, he had taught the class for 3 years.
到我毕业时，他已经教那个班三年了。
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