In JRuby 1.5 and earlier, all Ruby calls populated a thread-local data structure on every call.

在JRuby 1.5和更早的版本中，所有的Ruby调用都会在调用时占据一个thread - local数据结构。

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After the transfer, you use the data in that structure to copy the string itself into your buffer in the local store using another DMA transfer, and wait for it to complete.

传输之后，使用那个结构中的数据来将字符串自身复制到本地存储的缓存区内，方法是借助另一个dma传输并等待它完成。

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A zipper is a way of representing a data structure with a local context, such that navigation (iteration) and modification from the current context are, for the most part, constant-time.

zippers是使用本地上下文表示数据结构的一种方法，这使当前上下文中的导航(迭代)和修改在很大程度上具有常量时间的特点。

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When clients want to communicate with each other, they simply change their local copy of the data structure, and Firebase automatically ensures that the change propagates to other clients.

FORBES: Why Firebase Matters