When I was working as a valet attendant during college, a lady gave me a twenty dollar bill to pay for the three dollar fee.
当我在大学期间担任代客服务员时, 一位女士给了我一张二十美元的钞票来支付三美元的费用。
英语百科
Twenty dollar bill
The twenty dollar bill may refer to banknotes (bills) of currencies that are named dollar. Note that some of these currencies may have coins for 20 dollars instead. Some of these currencies may not have this denomination at all.