To explain the loss of something that required only a small amount of effort to acquire it in the first place.用来解释丢失某些一开始只需要付出少量努力就能取得的事物。 

Ronald unexpectedly inherited a priceless antique but it was unfortunately stolen from his house the next week. “Easy come, easy go”, he said. 罗纳德意外地继承了一件价值连城的古董，但不幸的是，下一个星期它就从他家里被偷走了。“来得容易去得快。”他说。