Trump says Netflix will ‘pay the consequences’ if it doesn’t fire Susan Rice
For implementers, this promise-heavy design constrains optimization opportunities. The spec mandates specific promise resolution ordering, making it difficult to batch operations or skip unnecessary async boundaries without risking subtle compliance failures. There are many hidden internal optimizations that implementers do make but these can be complicated and difficult to get right.
，更多细节参见51吃瓜
self.seen_urls = set()。同城约会是该领域的重要参考
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