Bacteria like these are known as extremofile 像这样的细菌被称为嗜极生物

296. capable of going a centimetre a day.
     每天能长长1厘米
297. In this world without sunlight
     在这个没有阳光的世界里
298. these bacteria extract energy from the hydrogen sulphide gas.
     这些细菌只能从硫化氢气体中吸收能量
299. Bacteria like these are known as extremofile
     像这样的细菌被称为嗜极生物
300. because of their ability to survive in such extreme conditions.
     因为它们能在这种极端环境中生存
301. And these extremofiles play another important role in this cave.
     这些嗜极生物还在这个洞中 扮演着另一个非常重要的角色
302. Surprisingly, they are the basis of a food chain
     令人吃惊的是 它们竟然是食物链中的第一环

来自《行星地球 第一季 第四集 Planet Earth S01E04 洞穴》第 299 行