noun ダウンロード 🔗共有 ハロン A hydrocarbon in which one or more hydrogen atoms have been replaced by halogens Examples : "Many older fire extinguishers contained halons, which were very effective at putting out fires but damaged the ozone layer. " 多くの古い消火器にはハロンが含まれており、消火には非常に効果的でしたが、オゾン層を破壊しました。 compound chemistry environment substance AIとチャット語彙ゲーム読解練習