有些人可能会认为，由于有OR逻辑，谓词的顺序不会造成差别，因为不管怎样它们都会被应用。
Some would think that with or logic, the order of the predicates wouldn't make a difference since they both must be applied anyway.
这将使开发人员不用再注重那些调节标记语言细微差别的过程中冗长乏味的细节，而更加关注应用程序的内容及其业务逻辑性。
This frees developers to focus on the business logic and content of their applications, rather than the tedious details of accommodating the nuances of each markup language.
答案是，不要使用 pt，让用户自己选择阅读字体大小，px 也一样，因为逻辑分辨率的差别，一个平台上的 px 和另一个平台的 px 是不一样大的。
The same goes even for pixels. Because of logical resolution differences, a pixel on one platform is not a pixel on another.
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