因为优先级是用整数表示的，所以规范的实现可以提供更多的优先级别。

Since the priority is represented as an integer an implementation could provide many more.

youdao

因为优先级是用整数表示的，所以规范的实现可以提供更多的优先级别。

Since the priority is represented as an integer an implementation could provide many more.

youdao