Down here, during the Ice Age, our cousins faced many new challenges. 在冰河时期 我们的表亲在这里面临许多新的挑战
the mammals were faced with a new challenge. 哺乳动物面临一个新的挑战
Twenty million years later, life faced one of its greatest challenges... 2000万年后 生命面临又一个巨大的挑战
We've faced some long odds before, Skipper, 我们曾遇过很多高风险的困境 老大
Not so long ago, these whales faced a graver threat. 不久之前 这些鲸鱼面临着更严重的威胁
reflect the challenges faced by all life on Earth. 正如地球上所有生命都要面临的挑战
This may be a glimpse of the unstable future faced by this magnificent creature. 这种巨大生物的前途很不乐观
Surely no greater ordeal is faced by any animal. 这绝对是动物们经受过的最严酷的考验