Only now can mountaineers reclaim the upper reaches. 山地动物只有此时才能 向更高的地方拓展疆土
Less than 2 percent of the sunlight reaches the floor, 只有不到2%的阳光能够到达丛林地表
and not enough of their energy reaches the ground to enable trees to grow. 到达地面的能量很少 并不足以支持树木生长