The dollar finished the day slightly down.
當(dāng)日結(jié)束時(shí)美元匯率略有下降。
What's the rate of exchange against the dollar?
與美元的兌換率是多少？
Here's a five dollar bill ─ please keep the change.
這是一張五元的鈔票——零錢(qián)就不用找了。
If you want the best, you have to pay top dollar.
你想要最好的，就得花大錢(qián)。
The US dollar went through a difficult time, in company with the oil market.
美元與石油市場(chǎng)同時(shí)經(jīng)歷了艱難時(shí)期。