pure and simple
纯粹明确地，没有其他复杂因素
口语·强调纯粹事实
英文释义
plain and straightforward; without any additional complexity or hidden motive
例句
The reason he quit was laziness, pure and simple.
典故来源
源自强调事物本质的直白表达，无修饰或隐藏含义。