It's estimated that over one third of the grass that grows on Earth 据估计 地球上超过三分之一的草
stretches one third of the way around our planet. 覆盖距离达到地球周长的三分之一
in one third of the lands of our planet. 地球上三分之一的土地
One third of spider monkeys never make it to adulthood. 三分之一的蜘蛛猴都活不到成年
and covering a third of a million square miles, 占地面积八十六万平方公里
Isopods, like giant marine woodlice a third of a meter long 等脚类动物,比如1/3米长的巨海虱
The Taiga circles the globe and contains a third of all the trees on Earth. 针叶林环球分布 占全球所有树木总量的三分之一
extends one third of the way around our planet. 便横跨了地球的三分之一
A third of the land on our planet is desert. 我们星球上1/3的陆地是沙漠
On its way the system drains a third of South America. 全部流域面积达到南美洲的1/3