By using the default attribute, you can leave the parameter in question blank and it is automatically assigned the default value.

通过使用缺省属性，您可以将所讨论的参数保留为空，缺省值将会自动分配到该参数。

youdao

Not only must the absolute value of the parameter in question be considered, but also the method of test whereby this value is to be established.

不但必须考虑所讨论的参数的绝对值，而且还要考虑检验方法，通过它以确定此值是否成立。

youdao

Wildcards - the funky question marks where a type parameter should go - are a means of expressing a type constraint in terms of an unknown type.

通配符—使用一个奇怪的问号表示类型参数—是一种表示未知类型的类型约束的方法。

youdao