a penny saved is a penny earned
省下来的一分钱就是挣来的一分钱
口语·强调节俭即赚钱
英文释义
Saving money is the same as earning money; it is wise to save money.
例句
I always turn off the lights when I leave—a penny saved is a penny earned.
典故来源
源自18世纪美国政治家本杰明·富兰克林的名言，强调节俭与储蓄的重要性。