Michael和李华今天早上都有课，此刻正往课堂走。李华今天会学到两个常用语：to goof off 和to hit the sack。
L：Michael，别往我湾塾斡雪块，行吗?你怎么象个小孩呀!
M: Li Hua, I'm just goofing off.
L：你就是厌恶。我不懂什么是goofing off.
M: Actually Li Hua, to goof off does mean that I'm acting stupid and not being serious. Goof is a verb.
L：噢，to goof off 就是干无聊的事，那你确实很无聊，老向我扔雪块。
M: To goof off is a great term. Young people use it a lot. It is often used to describe how young people are behaving.
L：年青人经常用to goof off来形容别人的行为?我记得念中学时班上有个学生老是打断教员的话，喜欢开玩笑，你可以嗣魅这个学生是goofing off吗?
M: Yeah, that's right. Children or young people often goof off. Do you remember when we were at the movies and those high school students threw candy at the screen, you could say they were goofing off.
L：对，没错，小孩和年青人经常会做一些无聊的事开玩笑。我才不会忘失踪我们那次去看片子的事呢。那几个中学生往银幕上扔糖不美观，真是太无聊了，他们还觉得好玩呢。
M: To tell you the truth, when I went to the library in high school with my roommates we would usually waste time and ended up goofing off.
L：你是说，你念中学时跟同窗去藏书楼念书，结不美观在那儿互相扔纸球?
M: Yeah, that's right.
L：怪不得你一路头考不上大学呢!行，教室到了，下课等我一路去藏书楼，可万万不要goof off。
L：这课真是死板无味。我最厌恶晚上上课，每次上完课，我都感应很累。
M: That's right. Even though it's not that late, I'm ready to hit the sack!
L：你说什么?你要去捅一个口袋?Sack不是麻袋吗?我觉得你很累了，而你此快要去行为?
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，原本to hit the sack是指去睡觉，sack在这里是指床，hit是去床上睡觉的意思。那我要坐下，能不能说to hit the chair?
M: No, not really. This phrase -- to hit the sack -- has a pretty limited meaning.
L：哟，to hit the sack只能指去睡觉，此外处所还不能用!那若是我午想睡个午睡，能不能说：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，只能指一天工作和进修后晚上去睡觉。那此刻我已经上了一天的学，再加上晚上上了这堂死板无味的课，我可以说：It's time for me to hit the sack。对不合错误?
M: That's correct, Li Hua. But don't forget that we have a test tomorrow.
L：我当然不会忘失踪明天的考试。
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：明天考试后你想好好进修，为下礼拜的考试作筹备。没问题，我帮你筹备，我们俩城市考得很好。
M: Yeah, I'm going to hit the sack. Bye, Li Hua!
Michael 今天教了李华两个常用语，一个是：to goof off，意思是做一些无聊的事，开玩笑;另一个是：to hit the sack，这是指晚上上床睡觉。