Every night, under the cover of darkness they come out to hunt. 在夜色的掩护下 他们每晚都会出来猎食
The spines that cover almost every plant in this desert 这片沙漠上的植物几乎都浑身是刺
Out here, there is no cover for an ambush. 这里没有任何伏击可用的遮挡物
it is their ability to survive annual change, that has enabled them to cover 它们这种在季节变化生存的本领
There are no leaves for cover and no young prey animals. 没有树叶可以掩护,没有幼小的猎物
they can cover nearly 2,000 miles during the summer months. 差不多整个夏季能够行进2000英里
Using the fog as cover, the bear approaches the herd. 在海雾的掩护下,北极熊向海象群靠近
For the leopard the snow provides cover 不过雪却能为雪豹提供掩护
Deserts cover one third of the land's surface 沙漠覆盖了地球表面的1/3