When building an in-memory tree is not desired or practical, use an iterative parsing technique that does not rely on reading the entire source file. LXML offers two approaches.

如果构建内存树并不是必须的或并不实际，则可以使用一种迭代解析技术，这种技术不需要读取整个源树。

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Advanced Mandarin Chinese, both reading and writing, is strongly desired. English does not need to be fluent-but you must be able to communicate in English.

需要中文阅读和书写流畅。英文不需要流利，但必须能够用英文交流。

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Performance: its specific application to the secondary process of teaching reading novels, often fails to produce the desired results.

表现为：将其具体应用到中学小说阅读教学过程中，往往收不到预期的效果。

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