I'm constantly having to mug up things ahead of teaching them.
我经常不得不
前攻读要讲的东西。
I'm constantly having to mug up things ahead of teaching them.
我经常不得不前攻读要讲的东西。
He fell asleep during the lesson.
他时睡着了。
I made the zip gun in class out of a toy airplane launcher.
我时用玩具飞机发
器改制
了这把枪。
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