形形色色的模因为自身的生存而激烈的斗争，只有那些适应自己的生存坏境，在保真度，多产性，长寿性三方面表现值均比较高的模因才有可能获胜。
Vast and various memes compete for survival in their living environment, and only those which have higher value in fidelity, fecundity and longevity have the chance to win out.
文中给出了滑动模均方稳定的充分条件，所设计的变结构控制律能够保证滑动模具有可达性。
The sufficient conditions of sliding mode mean stability are given, and the variable structure control law can guarantee the sliding mode to have reachability.
文中给出了滑动模均方稳定的充分条件，所设计的变结构控制律能够保证滑动模具有可达性。
The sufficient conditions of sliding mode mean stability are given, and the variable structure control law can guarantee the sliding mode to have reachability.
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