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。
The actuality of rainwater use in north China was analyzed, and the domestic theory and practical of rainwater use technique and some overseas successful experience were introduced in this paper.
分析了北方雨水利用的现状，对国内雨水利用技术理论和实践以及国外较成功的经验作了详细的介绍。
With the maturity and popularization of network technique, digital libraries have been put into practical use, which is an epoch making innovation of libraries.
随着网络技术的日益成熟和普及，数字图书馆已经开始成为现实，这是图书馆界具有划时代意义的一次变革。
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