Each message that requires reliable delivery assurance includes a Sequence header block.

需要可靠传输保证的每个消息都包含一个序列头部区域。序列头部区域包含一个唯一的序列identifier。

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One Web page doesn't block delivery of another, although they might interfere with each other slightly for such constrained resources as server memory or network bandwidth.

一个Web页面不会妨碍其他web页面的发送，尽管可能会由于诸如服务器内存或网络带宽之类的受限资源而使它们相互之间略有妨碍。

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Syntheses and properties of PLA-PEG block copolymers were introduced, and their applications for micelles, microspheres and nanoparticles in drug delivery system were also reviewed.

介绍PLA - PEG嵌段共聚物的合成和性质，综述其作为胶束、微球、纳米粒等的载体在药物释放系统中的应用。

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The U.S. Department of Justice announced that the Atlanta-based company would also "take steps" to block illicit online drug dealers from using their delivery service.

NPR: UPS Pays $40M To End Online Pharmacies Probe

Block grants do very little to give states any more flexibility to experiment with healthcare delivery systems.

FORBES: Vermont Moves Toward Single-Payer Healthcare