Use XML as much as possible: Where a language feature already exists in XML, don't duplicate or reinvent it.
尽可能的使用XML：如果一种语言特性已经在XML中存在，就不要重复或者重新发明。
The existence of a well-motivated use case was considered a strong argument for inclusion of a language feature.
存在动机良好的用例可以看作是包含一种语言特性的强大理由。
Erlang was originally developed by Ericsson for use in telecoms equipment, and the language has since been adopted elsewhere: it powers Facebook's chat feature, for example.
Erlang最初是由爱立信为了电信设备的应用而开发的，并且这样的语言已经被应用到了其他地方：例如它造就了Facebook的聊天功能。
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