来之不易: be not easily won; be hard won; be not easily come by; hard-earned; have not been easily won; it has not come easily.; not easily achieved [gotten; got; obtained]: 我们的成功来之不易。 our successes
钱来之不易: money doesn't grow on treesmoney doesn’t grow on trees
诺言来之不易: promise don"t come easypromises don't come easypronises don't come easy