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So competition was fierce. 于是，竞争很激烈。 There was also an omnivorous and unsettling new type of predator on the scene, 而且，出现了一种新的无所不吃的、令人不安的捕食者。 one so perfectly designed for attack tha
万物简史
Three thousand five hundred meters up in the Sayan Mountains near the Russian-Mongolian border, Siberian ibex search for food. They scratch a living from the meager grasses on the sunnier south facing slopes. But some have a different sort of appetit
自然百科2011年
The mystery of why giant pandas are forced to spend 14 hours a day eating foods has finally been solved - they can only digest around 17 per cent of the bamboo they swallow. 大熊猫不得不一天14个小时都在进食的谜题近日终于被解开了
阅读空间
1. Fluffy (like a baby bird; a duckling) 1.毛茸茸的（比如幼鸟：小鸭子） 2. Amphibious (can live on land and in water; a frog)2.两栖的（可以生活在陆地上和水中：青蛙） 3. Furry (covered with a thick coat of fur; a bear)
英语口语
As ashore, the ladies often cause the most terrible duels among their rival admirers; just so with the whales, who sometimes come to deadly battle, and all for love. They fence with their long lower jaws, sometimes locking them together, and so striv
白鲸记
Our development of larger brains had much to do with our evolution as a species. But the question is, what fueled the development of those larger brains? The most popular theory among anthropologists is that we switched to an omnivorous diet. Our anc
英语时差8，16