科学家们认为，路灯造成的光污染使萤火虫数量下降。这些小动物其实是一种甲虫，它们利用腹部发出的荧光来求偶。 Glow-worms are beetles that live in gardens, hedgerows, and heathlands. Emitting a bright green light at night, the females climb up plant stems ...