The read function returns the number of bytes read (up to the maximum that you specify), -1 on error, or zero if the end of the file has been reached.

read 函数返回读取的字节数（最高为您指定的最大值）；或者 -1，表示错误；或者 0，如果已经到达文件末尾。

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Read should return exactly the number of bytes requested, except on EOF or error; otherwise, the rest of the data will be substituted with zeroes.

除非碰到EOF或出现错误，否则read应该返回所请求的字节数的数据；否则，其余数据都会被替换成0。

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You may fail to connect to a site through IPv6 and have an error message sent to the requesting application on your computer (read: web browser).

你有可能在始于IPv6的情况下出现连接失败，并会有一条出错信息发送给你计算机上的请求应用(比如说：web浏览器)。

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In order for the technology to work in practice, Bond says, it must be possible to read the chips on thousands of pill bottles at once--without error.

FORBES: Tiny Chips Could Combat Counterfeit Pills