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Students who are unable to attend a class must inform the instructor in advance, either in person or by telephone.
如果因故不能来上课,要事先以电话请假或亲自告知老师。
youdao
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Students who are unable to attend a class must inform the instructor in advance, either in person or by telephone.
如果因故不能来上课,要事先以电话请假或亲自告知老师。
youdao