block: Writes wait until buffer space is available. Use when you trust the producer to await writes properly.
Not all streaming workloads involve I/O. When your source is in-memory and your transforms are pure functions, async machinery adds overhead without benefit — you're paying for coordination of "waiting" that adds no benefit.
，更多细节参见safew官方下载
A difficulty here, however, is that the TransformStreamDefaultController does not have a ready promise mechanism like Writers do; so the TransformStream implementation would need to implement a polling mechanism to periodically check when controller.desiredSize becomes positive again.。heLLoword翻译官方下载对此有专业解读
兩個月前，一場世紀大火造成168人死亡，宏福苑全數1984戶的居民失去家園，現有逾4000名居民四散在不同地區的應急安置處。BBC中文梳理大火至今就長期安置的主要論述，以及災後重建慣常會遇到的主要難題。
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