Once its lines are set, 当一排丝架设完毕后

21. The silk comes from glands in the glow worm's mouth
    丝产生自萤火虫口中的腺体
22. and is loaded with droplets of mucus.
    上面缀着一串粘液滴
23. Each glow worm produces dozens of these threads.
    每条萤火虫都会吐很多根这样的丝
24. Once its lines are set,
    当一排丝架设完毕后
25. the glow worm hangs from a mucus hammock
    萤火虫便用粘液将自己悬吊起来
26. and waits, like a patient angler.
    然后像一位耐心的钓鱼者似的 等待猎物上钩
27. But the glow worm doesn't leave everything to chance.
    不过 萤火虫并不会听天由命

来自《行星地球 第一季 第四集 Planet Earth S01E04 洞穴》第 24 行