These forests were growing here long before humans walked the Earth. 这片森林远在人类直立行走之前就出现了
At the Taiga's northern extent the growing season can last for just one month a year. 在针叶林的北部区域 树木的一年内的生长时节只有1个月
Their growing tips circle like lassoes, searching out anchors for their spindly stems. 它们的生长锥如套索般圆形移动 来寻找可以攀援的物体.
Their chicks join the growing band of youngsters exploring the tundra. 它们的小鸟跟其他小鸟一起探索冻土地带
But sometimes the formations in a cave stop growing altogether. 但有时洞穴内的这些活动会完全停止
Growing from humble streams to mighty rivers 涓涓细流汇集成泱泱大河
and they're growing bigger every year. 而且面积每年都在增大