Mark:What's up,dude?
Henry:I'm fine.How about you?
Mark:I'm trying to lose weight.
So I go to a dance class every night.
Do you want to come,too?
Henry:You want me to go to a dance class?
When pigs fly.
Mark:Believe it or not.
I've shed five pounds in two weeks.
Henry:Congratulations,
but I'll knock the socks off you.
I've lost ten pounds walking to work
instead of driving my car.
Mark:Wow,A small change of habit
makes a real difference.

马克：老兄，近来如何?
亨利：我挺好的，你怎么样?
马克：我正在努力减肥。所以我每天晚上
都去上舞蹈课。你要不要一起来？
亨利：你要我去上舞蹈课?

除非太阳打西边出来了。
马克：信不信由你。我两周内已经减掉5磅了。
亨利：恭喜你啊。但我也会令你刮目相看。
我现在都不开车，改成走路去上班，
我已经减掉10磅了。
马克：哇！习惯上的一个小小改变可以产生很大的作用！
(加粗部分被强调)