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Some people are unwilling to attend the classes partly because of the cost involved.
有些人不愿来上课，部分原因是所需的费用问题。
《牛津高阶英汉双解词典》
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Everybody can come to this school, without respect to class, race, or sex.
不论阶级, 种族, 性别,人人都可进这所学校上课.
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The one on the left is the school building where you'll have class next week.
左边的这个是教学楼,下星期你就在这儿上课.
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You should listen attentively in class so as not to miss what the teacher is saying.
上课时,你应该仔细听讲,这样才不会遗漏老师讲的内容.
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