1.Since Scala enumerations are just regular objects, you could use any object with vals to indicate different "enumeration values" .
因为Scala的枚举值是通常的对象，你可以使用任何val对象来指示不同的“枚举值”。
2.I confirm this by iterating over the vals variable, which returns a simple sum.
通过在vals变量上迭代，我确认了这一点，即返回一个简单的sum。
3.The second argument, vals, is a list of values for the keys that were passed into the function.
第二个参数是vals，这是传递到函数中的键的值列表。
4.Also, derived types can override vals declared inside parent types.
同时，继承类型可以重写在父类型中声明的值。