Some of those translators prefer to edit in two steps: first, compare target and sourcetexts, to check fidelity; then read the target text alone, to see if it flows.
Wikisource is a repository of sourcetexts, including annotations, translations, and supporting materials.
Wikisource是一个源文本资源库，包括注释、翻译和辅助材料。
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The re module is fairly widely used in Txt2Html to identify various textual patterns in the sourcetexts. A moderately complex example is worth looking at