When we enter a country, we have to get through customs first.

当我们进入一个国家时，我们必须先通过海关。

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After China enter WTO and reduce the import customs, many foreign companies would like to enter China market.

自从中国加入WTO并且降低了入口关税以后，很多外国公司将会进入中国市场。

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Next time you enter or leave the U.S., check the customs form for this reference.

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These allow trusted travelers to enter the United States and Canada with expedited clearance through immigration, security, and customs.

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Rockefeller and other critics of the industry say that cruise lines that are headquartered in the United States but have their ships registered elsewhere are getting a free ride on the backs of U.S. taxpayers, placing demands on federal agencies such as Immigration, Customs and the Coast Guard, which are charged with oversight when those ships enter and leave U.S. ports.

CNN: July 8, 2012 -- Updated 1911 GMT (0311 HKT)