Although you may mute your cellphones, it will distract you from classes thus reduce your study efficiency.

虽然你将手机调成了静音, 但它还是会分散你的课堂注意力从而降低学习效率。

Playing basketball helps me relax after a period of exhausting study and improves my study efficiency.

打篮球可以帮助我在一段时间的疲惫学习后得到放松，提高我的学习效率。