protect their builders from extremes of heat 保护着它们的主人
that's a mind-boggling amount of grass. 它们消耗的草数量惊人
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
This colony alone will collect over half a ton of grass every year. 仅这一个蚁群 每年就能收集五百多公斤草
With billions of ant colonies across the world's grasslands 数十亿蚁群遍布全球草原
Each blade is cut to length and placed into a garden of fungus. 每根叶片都被切成一定长度 放入菌圃
But they themselves can't digest one bit of it. 可它们根本无法消化叶片
One of the most remarkable is found here 其中最出色的
Each year they devour millions of tons of grass, 每年会吃掉数百万吨草