0ne out of every two cubs do not survive their first year out on the ice. 两只幼熊中往往会有一只无法在第一年存活下来
The skuas can survive further south than any other predator 与其他猛禽相比 贼鸥的厉害在于它能在地球的最南端生存
So how on earth does a plant-eater this size survive in a place apparently totally devoid of vegetation? 那么在地球上 如此巨大的植食动物是如何 在这个寸草不生的地方生存的呢
How do the cacti survive without rain? 仙人掌为何能在这个无雨地带生存
Few animals can survive these extreme changes. 只有少许动物能适应 这种极端的气候变化
because of their ability to survive in such extreme conditions. 因为它们能在这种极端环境中生存
Bats survive by staying close to the skylights, 蝙蝠之所以能生存是因为 它们始终呆在天窗附近
It's astonishing that these extraordinary cave dwellers manage to survive at all. 这些奇异的洞栖生物能如此成功地生存 的确令人称奇
have to survive on whatever washes into the cave from outside. 必须得吃任何从外边冲进洞内的东西
but they must still survive the attacks of other, more specialised, birds of prey. 但它们仍须躲过 其它更专业的猛禽的攻击