Although the light spot of the firefly is weak, it is a challenge to the dark.
萤火虫的光点虽然微弱，但亮着便是向黑暗挑战。
This species of fireflies has an internal "sensor" that let's them know when a nearby firefly has lit, in which they respond with their own light as quickly as possible.
这种萤火虫有一种内部“传感器”，附近有伙伴儿亮起来了，它们就会在最短的时间内发光回应。
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