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2.为了节约课堂时间，我们的老师要求我们在课堂上做一半练习，剩下的一半在课后作为家庭作业完成。
，our teacher has us do half of the exercises in class and complete the other half as our homework after class.
2. To save class time
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2.为了节约课堂时间，我们的老师要求我们在课堂上做一半练习，剩下的一半在课后作为家庭作业完成。
，our teacher has us do half of the exercises in class and complete the other half as our homework after class.
2. To save class time