今天上午，我给妈妈讲了“城门失火殃及池鱼”这个成语。可是妈妈不懂这个成语的'意思。我就给妈妈打了个比方。比如爸爸和妈妈在吵架，也把我给扯进去了，这就是这个成语的意思。妈妈说：“原来是这个意思呀，你可以当妈妈的小老师了。
This morning, I told my mother the idiom "fire in the city gate will bring disaster to the fish in the pond". But mother doesn't understand the meaning of this idiom. I made an analogy for my mother. For example, when father and mother are quarreling, they also involve me, which is the meaning of this idiom. My mother said, "that's what it means. You can be my mother's little teacher.