The only escape is below the surface. 唯一的藏身之处当然是在沙子下面
The heaviest sand rises only a few metres above the ground, 最重的沙子只能离开地面几米
But it is the only source of water, 可是这是唯一的水源
The only water Lechuguilla has are these wonderfully still clear pools. 龙舌兰洞中唯一的水 来自这些平静清澈的水塘
they have all not only lost the pigment in their skin, 它们不仅失去了皮肤色素
for they live only in cave waterfalls. 因为它们只生活在洞穴瀑布中
but they're not the only commuters in here. 但它们并非这里的唯一住客
but it's only with the help of today's technology 但只有借助现代科技
These flooded shafts are the region's only source of open fresh water. 这些水潭是整个地区 唯一的露天淡水资源
Each drop leaves behind only a miniscule amount of calcite, 每滴水珠只会留下极少量的方解石微粒