noun ダウンロード 🔗共有 エチン、アセチレン (official IUPAC name) The organic compound acetylene. The simplest alkyne, a colorless gaseous (at room temperature and pressure) hydrocarbon with the chemical formula C2H2. Examples : "Welding torches often use ethyne as a fuel because it burns with a very hot flame. " 溶接トーチは非常に高温の炎で燃焼するため、燃料としてエチンをよく使用します。 compound substance chemistry fuel technical science AIとチャット語彙ゲーム読解練習