求翻译：今天天气不错，李明带狗散步，一群孩子在湖边玩，突然，一个孩子掉入水中，李明跳入湖中，把那个孩子救了上来。是什么意思？

The weather is good today, Li Ming takes his dog for a walk, a group of children playing in the Lake, suddenly, a child fell into the water, Li Ming, plunged into the Lake, and saved the child.