(n.) 授课
His lecture was boring and half the students fell asleep.
他讲的课很无聊,一半的学生都睡着了。
laboratory
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(n.) 实验室
My chemistry class includes laboratory work.
我的化学课包括实验。
do someone good
对人有好处
The fresh air will do you good after being the house all day.
在屋子呆了一整天,吸吸新鲜空气对你是大有益处的。

