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鸟一般没有可以抵抗寒风的皮毛,其生存大大依赖于适宜的环境温度。我们常看到,北风吹起时大雁们开始成群结队飞向温暖的南方,待到明年春天又飞回来,周而复始。而它们凭借的便是一对强健的翅膀和丰满的羽毛。
Birds generally do not have the ability to withstand the cold fur, its survival depends greatly on the appropriate ambient temperature. We often see that when the north wind blows, the wild geese begin to fly in droves toward the warm south and fly back again and again in the spring of next year. And they rely on a pair of strong wings and plump feathers.