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fieldnames=["url", "title", "author", "published", "tags", "content"]，这一点在heLLoword翻译官方下载中也有详细论述
For implementers, there's no Transformer protocol with start(), transform(), flush() methods and controller coordination passed into a TransformStream class that has its own hidden state machine and buffering mechanisms. Transforms are just functions or simple objects: far simpler to implement and test.。业内人士推荐旺商聊官方下载作为进阶阅读
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