L: 這課真是枯燥無味。我最討厭晚上上課，每次上完課，我都感到很累。
M: That's right. Even though it's not that late, I'm ready to hit the sack!
L: 你說什么？你要去捅一個(gè)口袋？Sack不是麻袋嗎？我以為你很累了，而你現(xiàn)在要去運(yùn)動(dòng)？
M: No, no. It's a colloquial saying. I mean I'm going to bed. Sack, here means bed, and hit means going to.
L: 噢，原來to hit the sack是指去睡覺，sack在這里是指床， hit是去床上睡覺的意思。 那我要坐下，能不能說 to hit the chair?
M: No, not really. This phrase -- to hit the sack -- has a pretty limited meaning.
L: 喲，to hit the sack只能指去睡覺，別的地方還不能用！那要是我下午想睡個(gè)午睡，能不能說：I want to hit the sack?
M: No, it's usually used to talk about going to bed at night, after a long day at work or school.
L: 午睡也不能用，只能指一天工作和學(xué)習(xí)后晚上去睡覺。那現(xiàn)在我已經(jīng)上了一天的學(xué)，再加上晚上上了這堂枯燥無味的課，我可以說：It's time for me to hit the sack。 對不對？
M: That's correct, Li Hua. But don't forget that we have a test tomorrow.
L: 我當(dāng)然不會(huì)忘掉明天的考試。
M: Ok, now go hit the sack, but after tomorrow's test we will have to study seriously for next week's test, no more goofing off.
L: 明天考試后你想好好學(xué)習(xí)，為下星期的考試作準(zhǔn)備。沒問題，我?guī)湍銣?zhǔn)備，我們倆都會(huì)考得很好。
M: Yeah, I'm going to hit the sack. Bye, Li Hua!
Michael 今天教了李華兩個(gè)常用語，一個(gè)是：to goof off，意思是做一些無聊的事，開玩笑；另一個(gè)是：to hit the sack，這是指晚上上床睡覺。
