Each time a corresponding client socket contains any read, write or error operations, the corresponding callback function is called.
每当对应的客户端套接字包含读、写或错误操作时，调用对应的回调函数。
Each channel has a predefined function and is either a read channel or a write channel.
每个通道都是一个预定义的函数，它可能是一个读通道，也可能是一个写通道。
The callback function can read the records that were saved in named memory (7) and write each record to a file (8).
回调函数可以读取保存在已命名内存中的记录(7)并将每条记录写入一个文件(8)。
The type of database access, such as read or write, will be determined based on the nature of the bank teller function.
数据库访问的类型（比如读或写）将根据银行出纳功能的性质决定。
Quiesced exclusive 0x4 a table space is in this state when the application that invokes the table space quiesce function has exclusive (read or write) access to the table space.
Quiesced Exclusive0x4当调用表空间静默(quiesce)功能的应用程序独占(读或写)访问表空间时，该表空间就处于这种状态。
EBADF -- A function tried to use a bad file descriptor (it doesn't refer to an open file, for example, or it was used in an attempt to write to a file that was opened read-only).
函数尝试使用错误的文件描述符（例如，它不引用打开的文件，或者用于尝试写入以只读方式打开的文件）。
Upon successfully connecting to the database, this function returns a connection object, which is required in the subsequent database read and write operations.
如果成功地连接到数据库，这个函数会返回一个连接对象，后续的数据库读写操作需要使用这个对象。
Note that your function could not only read these values, but write them.
请注意，你的函数不仅可以读取这些值，但是写他们。
We specifies that the function should try to open the file for read and write.
我们指定标志位来让打开的文件能够读和写。
As an alternative to using the default file-based caching mechanism, you can specify a custom cache handling function that will be used to read, write and clear cached files.
一种使用以预设档案为基础的快取机制的方法是定义一个客制化快取处理函式，而此一函式将用来读取、写入、与清除快取档案。
As an alternative to using the default file-based caching mechanism, you can specify a custom cache handling function that will be used to read, write and clear cached files.
作为一种可选择的，使用默认基于文件的缓存机制，你可以定制自定义缓存处理函数用以读、写、清除缓存文件。
As an alternative to using the default file-based caching mechanism, you can specify a custom cache handling function that will be used to read, write and clear cached files.
作为一种可选择的，使用默认基于文件的缓存机制，你可以定制自定义缓存处理函数用以读、写、清除缓存文件。
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