USPS全稱是United States Postal Service，美國郵政署，亦稱美國郵局或美國郵政服務，是美國聯邦政府的獨立機構。中國郵政和美國郵政有很多不一樣的地方，我們請Karen給我們一一道來。When you hear Americans talking about the USPS， you probably wonder what it is. It stands for the United States Postal Service. Just like China Post， the USPS provides postal service across America. But whats different is the USPS is an independent agency of the U.S. federal government whereas China Post is state-owned.

What attracts me most about the USPS is the small.

White mail delivery vans[有蓬貨車]. The postmen are also drivers， steering the wheels on the right. （In the U.S.， like China， the driver normally sits on the left side of the car.） Therefore， they can deliver mail to every household[家庭] with a sidewalk[人行道] mail box without leaving the delivery vans. The van on the drivers side doesnt have a door， which gives them easy access[通路] to the mail boxes.

Therere tens of thousands of such USPS mail delivery vans working every day except Sundays. And if you want to mail a standard-sized letter， you dont need to visit the post office. All you need to do is just put the stamped mail into an outgoing mail slot[縫，狹槽] or in your own mail box and put up a red flag on the side of the mail box. The postman will pick up your letter when he delivers the daily mail to you.

In America， the standard domestic postage is 49 cents. If you want to buy some stamps for domestic mailing， you just ask for the Forever Stamp Book. Each book consists of 20 stamps. Why are they called Forever stamps？ Because postage cost varies over time， if you have a Forever stamp， its face value wont be affected even though the postage has risen.

Speaking of American stamps， theyre actually stickers. You dont need glue to paste the stamp on the envelope like those in China. You tear the back of the stamp and stick it on the envelope. There！ The letter is ready to mail. If youre a stamp collector， youll be thrilled to see zillions of varieties of American stamps. Therere people， nature， buildings， symbols， anniversaries of events and many more themes. I like to collect the stamps with the theme of Chinese New Year. Each year， the USPS will release a series of stamps with the Chinese zodiac[十二宮圖] or symbols related to Chinese cultures， such as kumquats[金橘]， red lanterns and fire crackers. They are really beautiful！