1. The dollar is American currency.
    美元是美国的货币。

2. Controlling this precision machine and its many weapons is like playing a million-dollar video game that has dozens of buttons.
    控制这架精密的机器和它所携带的众多武器，就像玩一个备有几十个按钮、价值百万的电子游戏。

3. One dollar and eighty- seven cents.
    一美元八十七美分.

4. It was a hideous act, but it helped the African to stay put on one plantation, since no calculating planter would care to part with a crippled slave for the current price of one dollar.
    这是一种惨不忍睹的暴行，但却使他在一家种植园呆了下来。因为没有一个精于算计的种植园主，会愿意为了一个美元而卖掉一个瘸腿的奴隶。