“公道的”的英语可以翻译为：[法] reasonable ...

我们以公道的价格出售各种化妆品.We sell a wide range of cosmetics at a very reasonable price.和解的条件似乎是公道的.The terms of settlement seem just.学生无法报复评分不公道的老师.Students have no way of getting back at a teacher who marks their work unfairly....