那些因为某些需要得带手机的学生必须取得父母和老师的同意，并且必须在上课期间上交手机。
Those who require their phones for some need must get their parents' and teachers' approval and must hand their phones over during class time.
在上课期间内不要离开学校。
学员在上课期间必须将手提电话及传呼机关掉。
All mobile phone and beeper must be switched off during lesson.
在上课期间，得到我们的批准后，时间表和频率是可以改变的。
During the class, get our approval, the timetable and frequency can be changed.
有几天在上课期间，他忽然一下子记不起一些字句，茫然地露出愧色。
Some days in the course of our lessons he would suddenly be at a loss for some word and look vacant and ashamed.
有几天在上课期间，他忽然一下子记不起一些字句，茫然地露出愧色。
Some days in the course of our lessons he would suddenly be at a loss for some word and look vacant and ashamed.
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