| They trim the grass down to its roots leaving little in their wake but within days the plant will recover and continue to sustain the biggest herds on earth. Grass is not confined to the tropics. It manages to grow even in the bitter conditions of the Arctic. Beyond the limits of the last tree the planet is barren and ice locked. The frozen no man's land at the end of the earth. But, for a short time each year, the long dark winter releases its grip. Temperatures rise, and grass that has lain dormant and frozen throughout the winter sprouts once more. Green returns to the Arctic. The receding ice reveals an immense flat plain, the size of Australia. This is the Arctic tundra. | |
| 它们一直啃到接近草的根部，吃得几乎不留痕迹，但几天之后草又会很快长出来，继续供养着地球上最大的动物群体。草不只生长在热带，甚至在北极那样恶劣的条件下也能生长。这是地球极地冰封的无人区，树木无法生长的地方，地表冰雪覆盖，一片荒凉，但每年会有一段短暂时光。漫长的冬夜露出了曙光，气温逐渐升高，冬天里处于冬眠和封冻状态的草慢慢地生长了出来。绿色重返北极，解冻的冰层露出了面积相当于澳大利亚的一大片平原。这就是北极冻原。 |
| They trim the grass down to its roots leaving little in their wake but within days the plant will recover and continue to sustain the biggest herds on earth. Grass is not confined to the tropics. It manages to grow even in the bitter conditions of the Arctic. Beyond the limits of the last tree the planet is barren and ice locked. The frozen no man' s land at the end of the earth. But, for a short time each year, the long dark winter releases its grip. Temperatures rise, and grass that has lain dormant and frozen throughout the winter sprouts once more. Green returns to the Arctic. The receding ice reveals an immense flat plain, the size of Australia. This is the Arctic tundra. | |
| ta men yi zhi ken dao jie jin cao de gen bu, chi de ji hu bu liu hen ji, dan ji tian zhi hou cao you hui hen kuai zhang chu lai, ji xu gong yang zhao di qiu shang zui da de dong wu qun ti. cao bu zhi sheng zhang zai re dai, shen zhi zai bei ji na yang e lie de tiao jian xia ye neng sheng zhang. zhe shi di qiu ji di bing feng de wu ren qu, shu mu wu fa sheng zhang de di fang, di biao bing xue fu gai, yi pian huang liang, dan mei nian hui you yi duan duan zan shi guang. man chang de dong ye lou chu le shu guang, qi wen zhu jian sheng gao, dong tian li chu yu dong mian he feng dong zhuang tai de cao man man di sheng zhang le chu lai. lv se chong fan bei ji, jie dong de bing ceng lou chu le mian ji xiang dang yu ao da li ya de yi da pian ping yuan. zhe jiu shi bei ji dong yuan. |
| They trim the grass down to its roots leaving little in their wake but within days the plant will recover and continue to sustain the biggest herds on earth. Grass is not confined to the tropics. It manages to grow even in the bitter conditions of the Arctic. Beyond the limits of the last tree the planet is barren and ice locked. The frozen no man' s land at the end of the earth. But, for a short time each year, the long dark winter releases its grip. Temperatures rise, and grass that has lain dormant and frozen throughout the winter sprouts once more. Green returns to the Arctic. The receding ice reveals an immense flat plain, the size of Australia. This is the Arctic tundra. | |
| tā men yī zhí kěn dào jiē jìn cǎo de gēn bù, chī dé jī hū bù liú hén jī, dàn jǐ tiān zhī hòu cǎo yòu huì hěn kuài zhǎng chū lái, jì xù gōng yǎng zháo dì qiú shàng zuì dà de dòng wù qún tǐ. cǎo bù zhǐ shēng zhǎng zài rè dài, shèn zhì zài běi jí nà yàng è liè de tiáo jiàn xià yě néng shēng zhǎng. zhè shì dì qiú jí dì bīng fēng de wú rén qū, shù mù wú fǎ shēng zhǎng de dì fāng, dì biǎo bīng xuě fù gài, yī piàn huāng liáng, dàn měi nián huì yǒu yī duàn duǎn zàn shí guāng. màn cháng de dōng yè lòu chū le shǔ guāng, qì wēn zhú jiàn shēng gāo, dōng tiān lǐ chǔ yú dōng mián hé fēng dòng zhuàng tài de cǎo màn màn dì shēng zhǎng le chū lái. lǜ sè chóng fǎn běi jí, jiě dòng de bīng céng lòu chū le miàn jī xiāng dāng yú ào dà lì yà de yī dà piàn píng yuán. zhè jiù shì běi jí dòng yuán. |
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