But global changes now threaten the great blooms of plankton on which the whales depend. 但是全球环境的变化 让蓝鲸赖以生存的浮游生物急剧减少 Once and not so long ago 曾经在不久以前 three hundred thousand blue whales roamed the oceans 30万头蓝鲸让海洋看上去充满生气 now, less than three ...
Once and not so long ago 曾经在不久以前 three hundred thousand blue whales roamed the oceans 30万头蓝鲸让海洋看上去充满生气 now, less than three percent of that number remains. 现在,只有不足9000头 Our planet is still full of wonders. 我们的星球仍然充满惊奇 As we explore them, so...
three hundred thousand blue whales roamed the oceans 30万头蓝鲸让海洋看上去充满生气 now, less than three percent of that number remains. 现在,只有不足9000头 Our planet is still full of wonders. 我们的星球仍然充满惊奇 As we explore them, so we gain not only understanding, ...
now, less than three percent of that number remains. 现在,只有不足9000头 Our planet is still full of wonders. 我们的星球仍然充满惊奇 As we explore them, so we gain not only understanding, but power. 当我们探索奇迹的时候 我们所谋取的不仅仅是去了解它,而是征服 It's not just the future...
on one of the smallest krill, shrimp-like crustaceans. 一种非常小的甲壳类动物-磷虾 They take many tons of water into their ballooning throats in a single gulp and sieve out what it contains. 它们一口可吃进几吨的海水 然后再过滤出想要的东西 Every day, each one swallows some fou...
They take many tons of water into their ballooning throats in a single gulp and sieve out what it contains. 它们一口可吃进几吨的海水 然后再过滤出想要的东西 Every day, each one swallows some four million krill. 每天一头蓝鲸可以吃进400万条磷虾 Such gargantuan harvests depend on ...
Every day, each one swallows some four million krill. 每天一头蓝鲸可以吃进400万条磷虾 Such gargantuan harvests depend on the continuing fertility of the oceans 这样巨大的食量依赖富饶的海洋的不断提供 But global changes now threaten the great blooms of plankton on which the ...
Such gargantuan harvests depend on the continuing fertility of the oceans 这样巨大的食量依赖富饶的海洋的不断提供 But global changes now threaten the great blooms of plankton on which the whales depend. 但是全球环境的变化 让蓝鲸赖以生存的浮游生物急剧减少 Once and not so long ago 曾经在不久...
Despite their great size, we still have little idea of where they travel in the vast oceans 撇开体积不论, 我们仍然不知道它在这广袤的海洋中去哪里旅行 and none at all of where they go to breed. 也不知道它们去哪里繁殖 The largest animal on Earth feeds almost exclusively 这地球上最大的动物只...
and none at all of where they go to breed. 也不知道它们去哪里繁殖 The largest animal on Earth feeds almost exclusively 这地球上最大的动物只有一种主食 on one of the smallest krill, shrimp-like crustaceans. 一种非常小的甲壳类动物-磷虾 They take many tons of water into their balloo...