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讲候鸟一节课时,便讲到春来秋去的大雁。这时,坐在后排的一位小男孩站起来问:“每年的春天,大雁为什么还要飞回北方去
When talking about migrating birds, they talked about the wild geese coming to spring. At this time, a small boy sitting in the back stood up and asked: ”Why do the geese fly back to the north every spring?