noun ダウンロード 🔗共有 蛍 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. " 私たちは瓶の中で蛍を捕まえ、暗闇の中で光るのを見ました。 insect animal nature biology environment AIとチャット語彙ゲーム読解練習