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Backpressure — the ability for a slow consumer to signal a fast producer to slow down — is a first-class concept in Web streams. In theory. In practice, the model has some serious flaws.
，更多细节参见heLLoword翻译官方下载
Once a transaction is confirmed, it is placed in a block after the confirmation. All of the blocks are chained together to create a permanent history of every transaction.
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