The first one is about the asynchronous nature of Node.
第一个是关于NodeJS的异步其本质的问题。
Because of their asynchronous nature, SIP servlets can seem complicated.
由于其异步本性，SIPServlet可能看起来有些复杂。
Processes, on another hand, are typically long running and asynchronous in nature.
另一方面，流程一般来说本质上就是长运行且异步的。
Processes, on another hand, are typically long running and asynchronous in nature.
另一方面，流程一般来说本质上就是长运行且异步的。
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