As you know, many subjects are very boring, and if the teacher is the one with sense of humor, you will be enegetic in his class and bear what you learned in mind.

你知道，很多学科是很无聊，如果老师有一种幽默的感觉，你将会活跃在他的课堂之上，并将你所学到的东西都装进脑袋。