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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. |
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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. |