noun 下载 🔗分享 萤火虫,流萤 Any beetle of the family Lampyridae, which exhibit bioluminescence during twilight. Examples : "We caught a firefly in a jar and watched it glow in the dark. " 我们捉了一只萤火虫放在罐子里,看它在黑暗中发光。 insect animal nature biology environment 与AI对话词汇游戏阅读练习