noun 下载 🔗分享 离子 An atom or group of atoms bearing an electrical charge, such as the sodium and chlorine atoms in a salt solution. Examples : "When salt dissolves in water, it breaks down into sodium ions and chloride ions. " 当盐溶解在水里时,它会分解成带正电的钠离子和带负电的氯离子。 chemistry physics element 与AI对话词汇游戏阅读练习