A relocatable expression denotes a value that requires relocation at link time, while an absolute expression denotes a value that requires no such relocation. 可再定位的表达式表示的值在连接时间请求再定位，而一个绝对表达式表示的值不需要再定位。
You could also consider r?econfiguring the firewalls to allow packetsfrom the relocatable address and the stationary address. 你也可以考虑重新配置防火墙，接受来自可再定位地址和固定地址的数据包。
