学个词 Learn A Word:1698 dual

　　今天我们要学的词是dual。Dual 双重的。A number of Taiwan residents who hold dual citizenships have chosen to renounce their American citizenship to avoid paying taxes under the Foreign Account Tax Compliance Act. 一些拥有双重国籍的台湾人决定放弃美国国籍，以免交按照海外帐户税收法案必须缴纳的税款。In a new book, two doctors claim that the rising cost of medical care in the U.S. is a dual threat to our health and pocketbooks. 两个医生在发表的新书中说，美国不断上涨的医疗开销是对民众健康和钱袋的双重威胁。好的，今天我们学习的词是 dual, dual, dual...