They're hidden until they begin to develop 它们隐匿起来 直到绽放的时刻

250. Flying insects begin to glow as they search for mates.
     飞虫们开始为寻找伴侣而发光
251. Fungi, unlike plants,
     菌类与植物不同
252. thrive in the darkness of the forest floor.
     在阴暗的森林地面茁壮地成长
253. They're hidden until they begin to develop
     它们隐匿起来 直到绽放的时刻
254. the incredible structures with which they reproduce.
     便以惊人的姿态生长繁殖
255. Each releases millions of microscopic spores
     每株蘑菇释放出数以百万的微型孢子
256. that drift invisibly away.
     无形地飘散各处

来自《行星地球 第二季 第三集 Planet Earth S02E03 丛林》第 253 行