这周四美国就中国对小麦、大米、玉米等三种农产品实施的关税配额管理措施提起世贸组织争端解决机制下的磋商请求，请看Shenzhen Daily在昨日的报道：
The United States launched late Thursday a challenge to China’s use of tariff-rate quotas (TRQs) for rice, wheat and corn at the World Trade Organization, charging that China’s administration of the program “breached its WTO commitments and hurt U.S. farm exports.”
The USTR said global prices for the three commodities were lower than China’s domestic prices, yet the country did not maximize its use of TRQs, which offer lower duties on a certain volume of imported grains every year. The USTR said that limited market access for shipments from the United States and other countries.
报道中的TRQ (tariff-rate quota)就是“关税配额”，是一种进口国限制进口货物数量的措施。 进口国对进口货物数量制定一数量限制，对于凡在某一限额内进口的货物可以适用较低的税率或免税，但关税配额对于超过限额后所进口的货物则适用较高或一般的税率。
