不断扩大的教授内容是让社会老师进退两难的难题：如何在有限的课堂时间里做到面面俱到呢？
That ever-expanding content is the crux of the social studies teacher's dilemma: How to cover every topic with limited class time?
首先，它占用了课堂的有限时间，此外，如果我们听不懂这些演讲，我们会失去学英语的信心。
To begin with, it costs the limited time in class. Besides, if we can not make sense of the speeches, we will lose confidence in learning English.
再加上有限的课堂教学时间，外语教师们在规定时间内很难完成教学任务。
Besides the limited class teaching hours, it is hard for foreign language teachers to fulfil their teaching task within the specified time.
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