I think that the most difficult aspect of reading this code is to realize that states are represented by a set of XPathNodes.
我认为，阅读该代码时，最困难的方面是认识到状态是由一组XPathNode表示的。
Limitations on sentence structure are also quite minimal. The most difficult aspect of learning Japanese is the mastery of the reading and writing of kanji.
句子结构的限制也很少，最难的方面可能是读写日本汉字。
Which is the most difficult aspect for you in learning Chinese idioms?
你认为汉语成语学习最难的是哪方面？
Which is the most difficult aspect for you in learning Chinese idioms?
你认为汉语成语学习最难的是哪方面？
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