| Midsummer on the tundra and the sun does not set. At these latitudes the sun's rays are glancing and not enough of their energy reaches the ground to enable trees to grow. You need to travel 500 miles south from here before that is possible. These stunted shrubs mark the tree line, the beginning of the boreal forest, the taiga. The needle-shaped leaves of the conifers are virtually inedible so this forest supports very little animal life. It's a silent place where the snow is unmarked by footprints. In the Arctic winter snow forms a continuous blanket across the land. But as spring creeps up from the south the taiga is unveiled. This vast forest circling the globe contains 1/3 of all the trees on Earth and produces so much oxygen it changes the composition of the atmosphere. As we travel south so the sun's influence grows stronger and at 50 degrees of latitude a radical transformation begins. | |
| 现在是冻土带的仲夏季节，太阳24小时挂在天空。在这一纬度地区，太阳的光是斜射的，地上所获得的能量不足以让树木生长。再往南800公里才可能有树木。这些低矮的灌木丛是林木线的开始，往南就是针叶林。动物无法吃针叶树的针形叶子，所以这片森林无法维持动物生存。这里一片静寂，雪地上没有任何脚印。北极的冬天，雪像一张巨大的毯子覆盖着大地。春天从南方悄然来到之后，针叶林也揭开了自己的面纱。这种广阔的森林带环绕地球一圈，占地球树木总量的1/3，它为地球提供了大量氧气，甚至改变了大气的构成。继续往南走，太阳的热力越来越大，在北纬50度地区，会出现完全不同的景象。 |
| Midsummer on the tundra and the sun does not set. At these latitudes the sun' s rays are glancing and not enough of their energy reaches the ground to enable trees to grow. You need to travel 500 miles south from here before that is possible. These stunted shrubs mark the tree line, the beginning of the boreal forest, the taiga. The needleshaped leaves of the conifers are virtually inedible so this forest supports very little animal life. It' s a silent place where the snow is unmarked by footprints. In the Arctic winter snow forms a continuous blanket across the land. But as spring creeps up from the south the taiga is unveiled. This vast forest circling the globe contains 1 3 of all the trees on Earth and produces so much oxygen it changes the composition of the atmosphere. As we travel south so the sun' s influence grows stronger and at 50 degrees of latitude a radical transformation begins. | |
| xian zai shi dong tu dai de zhong xia ji jie, tai yang 24 xiao shi gua zai tian kong. zai zhe yi wei du di qu, tai yang de guang shi xie she di, di shang suo huo de de neng liang bu zu yi rang shu mu sheng zhang. zai wang nan 800 gong li cai ke neng you shu mu. zhei xie di ai de guan mu cong shi lin mu xian de kai shi, wang nan jiu shi zhen ye lin. dong wu wu fa chi zhen ye shu de zhen xing ye zi, suo yi zhe pian sen lin wu fa wei chi dong wu sheng cun. zhe li yi pian jing ji, xue di shang mei you ren he jiao yin. bei ji de dong tian, xue xiang yi zhang ju da de tan zi fu gai zhe da di. chun tian cong nan fang qiao ran lai dao zhi hou, zhen ye lin ye jie kai le zi ji de mian sha. zhe zhong guang kuo de sen lin dai huan rao di qiu yi quan, zhan di qiu shu mu zong liang de 1 3, ta wei di qiu ti gong le da liang yang qi, shen zhi gai bian le da qi de gou cheng. ji xu wang nan zou, tai yang de re li yue lai yue da, zai bei wei 50 du di qu, hui chu xian wan quan bu tong de jing xiang. |
| Midsummer on the tundra and the sun does not set. At these latitudes the sun' s rays are glancing and not enough of their energy reaches the ground to enable trees to grow. You need to travel 500 miles south from here before that is possible. These stunted shrubs mark the tree line, the beginning of the boreal forest, the taiga. The needleshaped leaves of the conifers are virtually inedible so this forest supports very little animal life. It' s a silent place where the snow is unmarked by footprints. In the Arctic winter snow forms a continuous blanket across the land. But as spring creeps up from the south the taiga is unveiled. This vast forest circling the globe contains 1 3 of all the trees on Earth and produces so much oxygen it changes the composition of the atmosphere. As we travel south so the sun' s influence grows stronger and at 50 degrees of latitude a radical transformation begins. | |
| xiàn zài shì dòng tǔ dài de zhòng xià jì jié, tài yáng 24 xiǎo shí guà zài tiān kōng. zài zhè yī wěi dù dì qū, tài yáng de guāng shì xié shè dì, dì shàng suǒ huò dé de néng liàng bù zú yǐ ràng shù mù shēng zhǎng. zài wǎng nán 800 gōng lǐ cái kě néng yǒu shù mù. zhèi xiē dī ǎi de guàn mù cóng shì lín mù xiàn de kāi shǐ, wǎng nán jiù shì zhēn yè lín. dòng wù wú fǎ chī zhēn yè shù de zhēn xíng yè zi, suǒ yǐ zhè piàn sēn lín wú fǎ wéi chí dòng wù shēng cún. zhè lǐ yī piàn jìng jì, xuě dì shàng méi yǒu rèn hé jiǎo yìn. běi jí de dōng tiān, xuě xiàng yī zhāng jù dà de tǎn zi fù gài zhe dà dì. chūn tiān cóng nán fāng qiǎo rán lái dào zhī hòu, zhēn yè lín yě jiē kāi le zì jǐ de miàn shā. zhè zhǒng guǎng kuò de sēn lín dài huán rào dì qiú yī quān, zhàn dì qiú shù mù zǒng liàng de 1 3, tā wèi dì qiú tí gōng le dà liàng yǎng qì, shèn zhì gǎi biàn le dà qì de gòu chéng. jì xù wǎng nán zǒu, tài yáng de rè lì yuè lái yuè dà, zài běi wěi 50 dù dì qū, huì chū xiàn wán quán bù tóng de jǐng xiàng. |
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