Many students drop out of online courses because of the lack of teaching support.
许多学生因为缺乏教学支持而退出了在线课程。
"Many patients start treatment then drop out," says van Maaren.
“许多患者开始治疗后放弃，”van Maaren说。
Many people visited the exhibition. Some said: "oh, have you drop out?"
有些人还没进来在门口就说：“哦，已经撤展了。”
Many people visited the exhibition. Some said: "oh, have you drop out?"
有些人还没进来在门口就说：“哦，已经撤展了。”
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