【TOEFL核心词汇】No.53 公共设施
Hints：只听写例句。前面的单词不用听写。http://t1.g.hjfile.cn/listen/201212/201212091001219451222.mp3The price system of the United States is a very complex network composed of the prices of all the products bought and sold in the economy as well as those of a myriad of services, including labor, professional, transportation, and public utility services.
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