You can change back unused dollars into pounds at the bank.

　　你可以到銀行把沒(méi)有用掉的美元兌換回英鎊。

　　That one mistake left him thousands of pounds out of pocket.

　　那一次失誤讓他損失了數千英鎊。

　　The bomb was packed with several pounds of high explosive.

　　這枚炸彈裝有幾磅烈性炸藥。

　　Five pounds doesn't buy much nowadays.

　　如今五英鎊買(mǎi)不到多少東西了。

　　I've lost six and a half pounds since I started my diet.

　　從節食以來(lái)，我體重已減輕了六磅半。

　　The winner will receive ten pounds' worth of books.

　　獲勝者將得到價(jià)值十英鎊的書(shū)籍。