It's been dry for 55 million years. 干旱已经持续了五千五百万年
one million hectares of the rainforest have been destroyed 仅在马达加斯加 就有一百万公顷的雨林
It's the first time she's been as high as this on her own. 这是她第一次独自爬到如此高的地方
Seldom seen, the detail of their lives has long been a mystery, 由于行踪隐蔽 雪豹的生活细节一直是个谜
He's been fishing 50 miles offshore, 他前往远离海岸八十公里的海域捕鱼
For millions of years this remote spec of land has been ruled by crabs. 数百万年以来 这块遥远的陆地一直被蟹类统治着