cut and dried
adjective uk/ˌkʌt ən ˈdraɪd/ us/ˌkʌt ən ˈdraɪd/
决定的;固定的;已成定局的
already decided and unlikely to be changed
We need a cut-and-dried decision by the end of the week. 到这周末我们得把这事彻底定下来。
简单的，易于理解的
simple and easy to understand
Most fire investigations are pretty cut and dried, but this one has left more questions than answers. 大部分的火灾调查都很简单，但是这一次的却有很多问题还无法回答。