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天气渐渐转凉的时候,大雁们开始坐立不安。他们计划着飞往温暖的地方过冬,那里更容易找到吃的。可是一只叫宝儿的大雁只能孤单又伤心地留下来。这是为什么呢?
The weather is getting cooler, the geese began to restless. They plan to fly to warm places for winter, where it is easier to find food. But a geese named Boa only lonely and sad to stay. Why is this?