piggy

noun [专属名词]小猪

If you drop that into a piggy bank and then once a year put $1,434 in a savings account at 1% interest rate, you will have your trip money.
如果你把钱存到存钱罐里，然后每年把1434美元存到一个利率为1%的储蓄账户里，你就会有旅行资金了。