纪录片《我们的地球》 第46期 淡水资源(03)

（单词翻译）

Invertebrates¹ dominate these upper reaches.

无脊椎动物统治着上游河段

The hellgrammite, its body flattened² to reduce drag,

这是鱼蛉，其扁平的身体能减少水的冲击力

has bushy gills to extract oxygen from the current.

并依靠浓密的鳃从水中过滤氧气

Black fly larvae³ anchor themselves with a ring of hooks.

蚋的幼虫靠钩环固定自己

But if these become unstuck, they're still held by a silken safety line.

即使不小心松脱了，它们还有一根坚韧的“安全索”

There are advantages to life in the fast stream.

这些动物拥有在急流中生存的先天优势

Bamboo shrimps⁴ can just sit and sift⁵ out passing particles with their fan-like forearms.

拟匙指虾只需趴在河底，用它们的扇形前臂从流水中过滤出食物颗粒

Usually these mountain streams only provide enough food for small animals to survive,

通常，山涧提供的食物只能维持小型动物生存

but with the spring melt here in japan, monsters stir in their dens⁶.

可是在日本，每当春雪消融之际，一种怪物便在巢窟中苏醒。