您可以使用?将键设置为可选，所以

You can use the ? to make the keys optional, so

interface Partial {
   a?: boolean;
   b?: boolean;
   c?: boolean;
}

或者，您可以执行以下操作:

Or, you can do this:

type Keys = "a" | "b" | "c";

type Test = {
    [K in Keys]?: boolean
}