EFIS由两个主要的功能模块组成，分别称为数据预备模块和网络查看模块。
EFIS consists of two main functional modules, namely the Data Preparation module and the Web Viewing module.
这些事件可以是诸如计时器，信号，文件描述符上预备读取的数据，等等。
These events can be things like timers, signals, data ready for reading on a file descriptor, and so on.
通过一点预备工作，就可以节省日后跟踪数据完整性问题的大量时间。
With a little up-front work, you can save yourself a whole lot of time chasing data integrity problems later.
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