| But catching salmon in deep water is not that easy and the cubs have lots to learn. The annual arrival of spawning salmon brings huge quantities of food into these high rivers that normally struggle to support much life. Although relatively lifeless, the power of these upland rivers to shape the landscape is greater than any other stage in a river's life. Driven by gravity, they're the most erosive forces on the planet. For the past 5 million years Arizona's Colorado river has eaten away at the desert's sandstone to create a gigantic canyon. It's over a mile deep and at its widest it's 17 miles across. The Grand Canyon. This river has cut the world's longest canyon system - a 1,000-mile scar clearly visible from space. | |
| 在深水里捕捉鲑鱼可不是一件容易的事。这些小熊还有很多本领要学。一年一度的鲑鱼产卵季节给这些河流带来丰富的食物来源。通常情况下这些河流很难让太多的动物生存。虽然生物种类不多，但这些上游河段水位落差大，改变地貌的力量大于其它河段。受重力的影响，水流通常是地球上最主要的侵蚀力。过去500万年中，亚利桑那州科罗拉多河冲走大量的荒漠沙石，冲刷出了一条巨大峡谷。它深达1600多米，最宽的地方超过27公里。这就是科罗拉多大峡谷。这条河流切割出了世界上最长的峡谷，它长达1600多公里。 |
| But catching salmon in deep water is not that easy and the cubs have lots to learn. The annual arrival of spawning salmon brings huge quantities of food into these high rivers that normally struggle to support much life. Although relatively lifeless, the power of these upland rivers to shape the landscape is greater than any other stage in a river' s life. Driven by gravity, they' re the most erosive forces on the planet. For the past 5 million years Arizona' s Colorado river has eaten away at the desert' s sandstone to create a gigantic canyon. It' s over a mile deep and at its widest it' s 17 miles across. The Grand Canyon. This river has cut the world' s longest canyon system a 1, 000mile scar clearly visible from space. | |
| zai shen shui li bu zhuo gui yu ke bu shi yi jian rong yi de shi. zhei xie xiao xiong hai you hen duo ben ling yao xue. yi nian yi du de gui yu chan luan ji jie gei zhei xie he liu dai lai feng fu de shi wu lai yuan. tong chang qing kuang xia zhei xie he liu hen nan rang tai duo de dong wu sheng cun. sui ran sheng wu zhong lei bu duo, dan zhei xie shang you he duan shui wei luo cha da, gai bian di mao de li liang da yu qi ta he duan. shou zhong li de ying xiang, shui liu tong chang shi di qiu shang zui zhu yao de qin shi li. guo qu 500 wan nian zhong, ya li sang na zhou ke luo la duo he chong zou da liang de huang mo sha shi, chong shua chu le yi tiao ju da xia gu. ta shen da 1600 duo mi, zui kuan de di fang chao guo 27 gong li. zhe jiu shi ke luo la duo da xia gu. zhe tiao he liu qie ge chu le shi jie shang zui zhang de xia gu, ta chang da 1600 duo gong li. |
| But catching salmon in deep water is not that easy and the cubs have lots to learn. The annual arrival of spawning salmon brings huge quantities of food into these high rivers that normally struggle to support much life. Although relatively lifeless, the power of these upland rivers to shape the landscape is greater than any other stage in a river' s life. Driven by gravity, they' re the most erosive forces on the planet. For the past 5 million years Arizona' s Colorado river has eaten away at the desert' s sandstone to create a gigantic canyon. It' s over a mile deep and at its widest it' s 17 miles across. The Grand Canyon. This river has cut the world' s longest canyon system a 1, 000mile scar clearly visible from space. | |
| zài shēn shuǐ lǐ bǔ zhuō guī yú kě bú shì yī jiàn róng yì de shì. zhèi xiē xiǎo xióng hái yǒu hěn duō běn lǐng yào xué. yī nián yí dù de guī yú chǎn luǎn jì jié gěi zhèi xiē hé liú dài lái fēng fù de shí wù lái yuán. tōng cháng qíng kuàng xià zhèi xiē hé liú hěn nán ràng tài duō de dòng wù shēng cún. suī rán shēng wù zhǒng lèi bù duō, dàn zhèi xiē shàng yóu hé duàn shuǐ wèi luò chà dà, gǎi biàn dì mào de lì liàng dà yú qí tā hé duàn. shòu zhòng lì de yǐng xiǎng, shuǐ liú tōng cháng shì dì qiú shàng zuì zhǔ yào de qīn shí lì. guò qù 500 wàn nián zhōng, yà lì sāng nà zhōu kē luó lā duō hé chōng zǒu dà liàng de huāng mò shā shí, chōng shuā chū le yī tiáo jù dà xiá gǔ. tā shēn dá 1600 duō mǐ, zuì kuān de dì fāng chāo guò 27 gōng lǐ. zhè jiù shì kē luó lā duō dà xiá gǔ. zhè tiáo hé liú qiē gē chū le shì jiè shang zuì zhǎng de xiá gǔ, tā cháng dá 1600 duō gōng lǐ. |
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