physical changes短语⁵⁶⁹²³ 基本英英例句 物理变化原型physicalchange的复数 名词 physical change: a change from one state solid or liquid or gas to another without a change in chemical composition Most chemical changes, most physical changes don't happen in isolated systems. 但是大部分的化学反应,并不是发生在孤立系统中的。163