the shared memory segment meaning in English

共享内存段

To detach the shared memory segment located at the address specified by
将由shmaddr所指定的地址处的共享内存段与调用进程的数据段断开：
Returns the identifier of the shared memory segment associated to the value of the argument key
返回与参数key值相关的共享内存段的标识符。
If the application uses shared memory segments , care has to be taken to place the starting addresses of the shared memory segments appropriately unless the user wants to rely on the system - provided initial addresses
如果应用程序使用共享内存段，那么必须要小心地设置共享内存段的起始位置，除非用户想依赖系统所提供的初始地址。