becomes luminous. 却发起了光

258. that reach upwards to catch any feeble current
     努力朝上生长 以捕捉潮湿空气中
259. there might be in the clammy air.
     可能存在的稀薄氧气
260. But this one, as it grows,
     然而这一株 长着长着
261. becomes luminous.
     却发起了光
262. Why fungi light up has remained a mystery...
     蘑菇发光的原因一直是个谜团
263. ...until now.
     直到现在才被解开
264. Scientists studying the brightest fungi in the world
     科学家研究了世界上最亮的蘑菇

来自《行星地球 第二季 第三集 Planet Earth S02E03 丛林》第 261 行