我们要介绍的第一个词汇是：To twist someone's arm。 Twist是拧，用力扭转的意思。一个人要是给别人把手臂拧到身后去那是很难受的。To twist someone's arm这个习惯用语的意思也正是如此，它是指给某人施加压力，迫使他做你要他做的事。下面这个例子是一个学生说的话：

　　例句-1: "I didn't want see that movie about Mozart, but my roommate twisted my arm. I'm glad he did - it was a great show."
　　他说：“我本来不想去看那个有关莫扎特的电影的。可是，我同房间的同学硬逼着要我去。不过，看了电影后我倒很高兴，因为那个电影太好了。”

　　这个学生还算运气，尽管他本来不愿意，可是结果还不错。但是，被迫做的事往往会产生不愉快的结局。请听下面这位爸爸说的话：

　　例句-2:"My son has been twisting my arm to let him take my car out on a date ever since he got his driver's license. This weekend, I finally let him take it. And now it's in the body shop for a thousand dollars of repairs: he had an accident on the way to pick up his girlfriend."
　　他说：“自从我儿子拿到驾驶执照以来，他一直闹着要开我的车去赴约会。这个周末，我终于答应了。可是，他在去接女朋友的路上出了车祸，现在我的车正在车库里修，要花一千美元呢。”

　　下面我们要讲的一个俗语里既有arm 也有 leg： To charge someone an arm and a leg。 Charge就是要多少价钱的意思。任何东西要你付出一只手臂，还加上一条腿恐怕要价也太高了一点，很不值得。很明显，to charge someone an arm and a leg的意思就是要价太高。下面这句话就是一个例子：

　　例句-3: "Don't go to that fancy new restaurant. The food isn't very good and they charge you an arm and a leg for it!"
　　这个人说：“别上那个新开的高级饭馆去。他们的菜并不好，而价钱倒贵得要命。”

　　在美国，一般人都很怕去看牙大夫。这不仅是为了怕痛，而是他们要价都很高，动一点小手术就是好几百美元，有的甚至要几千美元。下面这句话就反应了这个情况：

　　例句-4: "Say, if you need a dentist, you might want to try my brother. He's fresh out of dental school and trying to set up a practice. But he does good work, and he won't charge you an arm and a leg for it like most other dentists."
　　这个人说：“喂，要是你想找牙大夫，你可以上我弟弟那里去试一下。他刚毕业，正在设法开业。可是，他技术很好，也不会像其他许多牙大夫那样收费很高。”