| One season hands over to another. Some organisms thrive on decay, but most must make special preparations for winter and a life with little sun. Whole populations of animals are now forced to travel great distances in pursuit of food and warmth. 300,000 Baikal teal gather to escape from the Siberian winter by migrating south to Korea - the world's entire population in a single flock. But there are parts of the world that have no seasons. In the tropics the sun's rays strike the earth head on and their strength is more or less constant all year round. That is why the jungle grows so vigorously and supports so much life. This forest covers only 3% of the planet's surface, but it contains more than 50% of all its plants and animals. The canopy is particularly rich. There are monkeys, birds and millions of species of insects, exactly how many we have no idea. The character of the forest changes as we descend, becoming ever darker and damper, favouring different kinds of animals and plants. | |
| 季节更替，有些生物依靠枯枝败叶茁壮生长，但大部分物种必须为阳光极少的冬天做特别的准备。大批动物不得不一起长距离迁徙去寻找食物和温暖。30万只花脸鸭聚集在一起，向朝鲜半岛南迁以躲避西伯利亚的寒冬。这个迁徙的鸟群数量竟然如此众多！但地球上也有的地方没有四季。在热带，阳光是直射的，这里的气温一年到头变化不大。所以，这里的森林生长十分茂盛，能够供养如此多的生命。赤道森林只占地球表面的3%，但它的动植物却超过全球动植物总量的50%。树冠部分的动物物种异常丰富。有猴子，鸟类，还有数百万种昆虫，数量到底有多少我们无法统计。从树冠往下，情况会发生变化，它变得更暗，更潮湿，这正是某些动物和植物所喜欢的。 |
| One season hands over to another. Some organisms thrive on decay, but most must make special preparations for winter and a life with little sun. Whole populations of animals are now forced to travel great distances in pursuit of food and warmth. 300, 000 Baikal teal gather to escape from the Siberian winter by migrating south to Korea the world' s entire population in a single flock. But there are parts of the world that have no seasons. In the tropics the sun' s rays strike the earth head on and their strength is more or less constant all year round. That is why the jungle grows so vigorously and supports so much life. This forest covers only 3 of the planet' s surface, but it contains more than 50 of all its plants and animals. The canopy is particularly rich. There are monkeys, birds and millions of species of insects, exactly how many we have no idea. The character of the forest changes as we descend, becoming ever darker and damper, favouring different kinds of animals and plants. | |
| ji jie geng ti, you xie sheng wu yi kao ku zhi bai ye zhuo zhuang sheng zhang, dan da bu fen wu zhong bi xu wei yang guang ji shao de dong tian zuo te bie de zhun bei. da pi dong wu bu de bu yi qi chang ju li qian xi qu xun zhao shi wu he wen nuan. 30 wan zhi hua lian ya ju ji zai yi qi, xiang chao xian ban dao nan qian yi duo bi xi bo li ya de han dong. zhe ge qian xi de niao qun shu liang jing ran ru ci zhong duo! dan di qiu shang ye you de di fang mei you si ji. zai re dai, yang guang shi zhi she di, zhe li de qi wen yi nian dao tou bian hua bu da. suo yi, zhe li de sen lin sheng zhang shi fen mao sheng, neng gou gong yang ru ci duo de sheng ming. chi dao sen lin zhi zhan di qiu biao mian di 3, dan ta de dong zhi wu que chao guo quan qiu dong zhi wu zong liang de 50. shu guan bu fen de dong wu wu zhong yi chang feng fu. you hou zi, niao lei, hai you shu bai wan zhong kun chong, shu liang dao di you duo shao wo men wu fa tong ji. cong shu guan wang xia, qing kuang hui fa sheng bian hua, ta bian de geng an, geng chao shi, zhe zheng shi mou xie dong wu he zhi wu suo xi huan de. |
| One season hands over to another. Some organisms thrive on decay, but most must make special preparations for winter and a life with little sun. Whole populations of animals are now forced to travel great distances in pursuit of food and warmth. 300, 000 Baikal teal gather to escape from the Siberian winter by migrating south to Korea the world' s entire population in a single flock. But there are parts of the world that have no seasons. In the tropics the sun' s rays strike the earth head on and their strength is more or less constant all year round. That is why the jungle grows so vigorously and supports so much life. This forest covers only 3 of the planet' s surface, but it contains more than 50 of all its plants and animals. The canopy is particularly rich. There are monkeys, birds and millions of species of insects, exactly how many we have no idea. The character of the forest changes as we descend, becoming ever darker and damper, favouring different kinds of animals and plants. | |
| jì jié gēng tì, yǒu xiē shēng wù yī kào kū zhī bài yè zhuó zhuàng shēng zhǎng, dàn dà bù fèn wù zhǒng bì xū wèi yáng guāng jí shǎo de dōng tiān zuò tè bié de zhǔn bèi. dà pī dòng wù bù dé bù yì qǐ cháng jù lí qiān xǐ qù xún zhǎo shí wù hé wēn nuǎn. 30 wàn zhǐ huā liǎn yā jù jí zài yì qǐ, xiàng cháo xiǎn bàn dǎo nán qiān yǐ duǒ bì xī bó lì yà de hán dōng. zhè gè qiān xǐ de niǎo qún shù liàng jìng rán rú cǐ zhòng duō! dàn dì qiú shàng yě yǒu de dì fāng méi yǒu sì jì. zài rè dài, yáng guāng shì zhí shè dì, zhè lǐ de qì wēn yì nián dào tóu biàn huà bù dà. suǒ yǐ, zhè lǐ de sēn lín shēng zhǎng shí fēn mào shèng, néng gòu gōng yǎng rú cǐ duō de shēng mìng. chì dào sēn lín zhǐ zhàn dì qiú biǎo miàn dí 3, dàn tā de dòng zhí wù què chāo guò quán qiú dòng zhí wù zǒng liàng de 50. shù guān bù fèn de dòng wù wù zhǒng yì cháng fēng fù. yǒu hóu zi, niǎo lèi, hái yǒu shù bǎi wàn zhǒng kūn chóng, shù liàng dào dǐ yǒu duō shǎo wǒ men wú fǎ tǒng jì. cóng shù guān wǎng xià, qíng kuàng huì fā shēng biàn huà, tā biàn de gèng àn, gèng cháo shī, zhè zhèng shì mǒu xiē dòng wù hé zhí wù suǒ xǐ huān de. |
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