Sometimes a United States dollar is worth twelve pesos in Mexico.

汇率会不时地波动，有时一美元值十二墨西哥比索，有时只值八比索。

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Only the United States dollar was convertible into gold, at the price of $35 an ounce.

只有美元可以按35美元换一盎司黄金的价格来兑换成黄金。

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As of 24 March 2005 the United States dollar is exchanged for 62.0313 Serbian dinars, and the Euro for 80.9570 dinars.

2005年3月24日，汇率是一美元等于62.0313个塞尔维亚第纳尔，一欧元等于80.9570个第纳尔。

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A new eighteen-million-dollar project aims to create eleven telepresence centers for federal employees around the United States.

VOA: special.2010.11.22

Snack foods made with corn are a six-billion-dollar industry in the United States.

VOA: special.2011.03.08

The United States has a fourteen trillion dollar economy.

VOA: special.2010.04.23

The fund seeks to earn current income reflective of money market rates in China available to foreign investors, and to provide exposure to movements in the Chinese Yuan relative to the United States dollar.

FORBES: Is the Age of America Ending in 2016?

Every extra dollar of current account deficit incurred by the United States is another dollar that has to be funded by foreigners.

FORBES: U.S. Decline: An Open Letter to a Closed Mind

In the long run, we have to pay for our imports with exports although that discipline works more directly on other countries than it does on the United States since the Dollar is a reserve currency that foreigners are willing to hold and use.

FORBES: The Role of Foreign Trade on GDP