Once bitten, twice shy; to learn a lesson from being cheated or making a mistake and become wiser.
经过那次失败的投资，他终于上当学乖了，下次再也不轻易相信高回报的承诺。
After that failed investment, he finally learned his lesson and would never easily trust promises of high returns again.
Era:
Early Modern
Frequency:
Next Idiom