The descent from the treetops to a life on the forest floor. 从树上下到森林地面生活
not least on one group of animals... 尤其是对这一类动物
On its own, a snowflake is a fragile, frozen wonder. 雪花本身就是一个脆弱的冰冻奇迹
Such is the role of chance in the history of life on our planet. 这就是机遇在地球生命历史中 所扮演的角色
The mammals have conquered every habitat on Earth. 哺乳动物征服了地球上每一片栖息地
But unlike whales, they still spend much of their time lazing on land. 但与鲸不同 它们多数时间仍懒洋洋地躺在陆地上
But the leopard's legacy lives on. 但这只雪豹的遗志会传承下去
learning the skills needed to survive on the very edge of life. 学习在生命边缘生存所需的技能