1There are 4 lessons in the morning.We can't concentrate on listening to the lessons if we don't have breakfast .And this will greatly reduce our learning efficiency
不知道前后句式是怎样的,试着翻译了几句,供参考:Learning efficiency is on the decline. 学习效率每况愈下Learning efficiency declines 学习效率降低了The decline of learning efficiency 学习效率的降低……