A billfold is a small, flat case, often leather, that you carry in a pocket. Inside it you keep paper money, credit cards, and sometimes an ID.

A billfold is a small, flat casebillfold是一個小小扁扁的夾子，often leather通常是皮製的，that you carry in a pocket放在口袋裡帶著走。Inside it you keep paper money, credit cards裡面放紙鈔、信用卡，and sometimes an ID有時候還有身分證件。

It is the American name; in Britain people say wallet, and they will understand billfold but they themselves will not often use it. The “bill” here is the American word for a paper banknote — a dollar bill, a five-dollar bill — and the “fold” is the way the case closes, folding those notes in on themselves.

It is the American name這是美式說法；in Britain people say wallet在英國大家說wallet，and they will understand billfold but they themselves will not often use it他們聽得懂billfold，但自己不常用。The "bill" here is the American word for a paper banknote這裡的'bill'是美式英文裡「紙鈔」的意思——a dollar bill, a five-dollar bill像'a dollar bill'、'a five-dollar bill'——and the "fold" is the way the case closes而'fold'指的是夾子闔上的方式，folding those notes in on themselves把那些鈔票對折收起來。

Though actually, many billfolds today hold more cards than cash, but the old name has stuck. Think of the slim 皮夾 in a back pocket, not a larger bag.

Though actually, many billfolds today hold more cards than cash不過其實現在很多billfold裝的卡比現金還多，but the old name has stuck但舊名字還是留了下來。Think of the slim 皮夾 in a back pocket就想成放在後口袋裡的薄薄皮夾，not a larger bag不是比較大的包包。