Thanks to this practice, any studying you do will be focused on real use of the language relevant to your life, rather than theoretical applications recommended in generic courses.
This approach obviously oversimplifies the grandeur of language, and is doomed to be an incomplete theoretical model.
这种方法显然过于简化了语言的复杂性，而且显然是一个不完整的理论模型。
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However, this theoretical ability is often impractical. There are several cases where you may need to write code in a more traditional language rather than XSLT.