But there are parts of the world that have no seasons. 但是 世界上有些地方却没有四季 In the tropics the sun's rays strike the earth head on 在热带地区 太阳辐射直射大地 and their strength is more or less constant all year round. 全年始终或多或少地 受到这种影响力的控制 That is why th...
In the tropics the sun's rays strike the earth head on 在热带地区 太阳辐射直射大地 and their strength is more or less constant all year round. 全年始终或多或少地 受到这种影响力的控制 That is why the jungle grows so vigourously 因此 这里的丛林茂密葱郁 and supports so much life. 生...
and their strength is more or less constant all year round. 全年始终或多或少地 受到这种影响力的控制 That is why the jungle grows so vigourously 因此 这里的丛林茂密葱郁 and supports so much life. 生命在此欣欣向荣 This forest covers only 3 percent of the planet's surface, 这些森...
but most must make special preparations for winter and a life with little sun. 而更多的却得专门为冬天做好准备 以度过缺少阳光的日子 Whole populations of animals are now forced to travel great distances in pursuit of food and warmth. 动物们成群结队踏上 寻找食物和温暖的长途旅程 300,000 Ba...
Whole populations of animals are now forced to travel great distances in pursuit of food and warmth. 动物们成群结队踏上 寻找食物和温暖的长途旅程 300,000 Baikal teal gather to escape from the Siberian winter by migrating south to Korea - 30万只花脸鸭集体迁往南方的韩国 躲避西伯利亚的...
300,000 Baikal teal gather to escape from the Siberian winter by migrating south to Korea - 30万只花脸鸭集体迁往南方的韩国 躲避西伯利亚的严冬 the world's entire population in a single flock. 仅这一群便集中了世界上所有的花脸鸭 But there are parts of the world that have no seas...
so the deciduous forests of America begin to shut down 美洲落叶林开始放慢生命的脚步 losing their leaves in preparation for the dark cold months ahead. 它们落下树叶 以应对即将到来的几个月的严寒和黑暗 One season hands over to another. 一个季节接替另一个季节 Some organisms thrive on decay, ...
losing their leaves in preparation for the dark cold months ahead. 它们落下树叶 以应对即将到来的几个月的严寒和黑暗 One season hands over to another. 一个季节接替另一个季节 Some organisms thrive on decay, 有的生物在腐烂中获得兴盛 but most must make special preparations for winter and a ...
One season hands over to another. 一个季节接替另一个季节 Some organisms thrive on decay, 有的生物在腐烂中获得兴盛 but most must make special preparations for winter and a life with little sun. 而更多的却得专门为冬天做好准备 以度过缺少阳光的日子 Whole populations of animals are now forced...
Some organisms thrive on decay, 有的生物在腐烂中获得兴盛 but most must make special preparations for winter and a life with little sun. 而更多的却得专门为冬天做好准备 以度过缺少阳光的日子 Whole populations of animals are now forced to travel great distances in pursuit of food ...