- that stretches across a tenth of our planet -
这座山脉绵延长达地球圆周的1/10 - the Himalayas.
它就是喜马拉雅山脉 - These, the highest mountains of the world,
这些世界上最高的山峰 - like other great ranges,
与其它大型山脉一样 - were created by the collision of continents.
也是由于大陆板块相撞而形成的 - Some 50 million years ago
大约5千万年前 - India collided with Tibet
印度次大陆板块撞上西藏