...until now. 直到现在才被解开

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
265. think they may have an answer.
     认为他们或许找到了答案
266. Like a beacon, the light attracts insects.
     光线像灯塔一样吸引着昆虫

来自《行星地球 第二季 第三集 Planet Earth S02E03 丛林》第 263 行