奇偶校验：加于一组二进制数字内的一个校验数元。它跟据系统逻辑，使总数为奇数或偶数。
Parity bit: a check bit added to a series of binary digits to make the total odd or even according to the logic of the system.
GDB检查所给链接中校验数匹配的调试信息文件，检查这些名称，并从找到的第一个文件中读取调试信息。
GDB checks under each of these names for a debugging information file whose checksum matches that given in the link, and reads the debugging information from the first one it finds.
这个校验和的基本规则是前九位数的每一位乘上它的位置(即第一位数乘上1，第二位数乘上2，依次类推)。
The basic rule for this checksum is that each of the first nine digits is multiplied by its position (that is, the first digit times one, the second digit times two, and so on).
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