Automatic configuration is not available because the individual components of the virtualization stack do not have enough information to make tuning decisions.
无法进行自动配置，这是因为虚拟栈的单个组件没有足够信息来做出调优决策。
2
The stack region is used for subroutine return addresses, as well as to store automatic data.
stack区域用于子程序返回地址，也用于存储自动数据。
3
Due to its dynamic property, automatic service discovery is obviously crucial for MANET, and become an indispensable component in protocol stack of MANET.