关键点：载体线程永远不会因为虚拟线程的 IO 等待而阻塞，它们一直在执行不同的虚拟线程。一个载体线程可以在一秒钟内服务几十个虚拟线程（因为每个虚拟线程真正占用载体线程的时间很短，大部分时间在等待）。
制度的框架由此搭建，但内容完善并未止步。
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It’s also worth noting that even if alternatives superior to agar were found, scientists are reluctant to abandon established protocols (even when microbiologists do use other jellies, they often still add agar to the mix, for example, to increase the gel strength of the solid media). As agar has been the standard gelling agent in microbiology for around 150 years, an enormous infrastructure of standardized methods, reference values, and quality control procedures has emerged around its specific properties. Switching to a different medium (even a superior one) means results may not be directly comparable to decades of published literature or to other laboratories’ findings.
Additional reporting by Danielle Kaye and Pritti Mistry
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