once bitten twice shy的意思是：一回上当两回乖。
双语例句：
1.She certainly won't marry again once bitten, twice shy.
她肯定不再结婚了——所谓一朝被蛇咬，十年怕井绳。
2.She certainly won't swim again-once bitten, twice shy.
她肯定不会再游泳了——所谓一朝被蛇咬，十年怕井绳。
3.Once bitten, twice shy. This means you never make the same mistake twice. You learn from your mistakes.
一着被蛇咬三年怕井绳，意味着你再也不会再放同样的错误，你从错误中汲取教训。
4.Once bitten, twice shy. I always do now.
我现在常查。吃过一次亏有教训了。
5.I'm sure the shopkeeper gave me too little change so I am going to check it carefully next time - once bitten, twice shy.
我断定店主少找给我零头，因此下次我要仔细核对一下才是-次上当，下次小心。
