DOFL

例句：

1. 1.The dollar is the currency of the United States.
   美元是美国的货币。
2. 2. He bought a new car for $50,000.
   他花了5万美元买了一辆新车。
3. 3.She earned her first paycheck in DOLLARS.
   她第一次挣到工资是美元。