the weakest goes to the wall 强胜弱败；适者生存；优胜劣败

【例句】
The weakest goes to the wall，the strong always succeeds.
优胜劣败，强者总是成功的。

His series of military thoughts, including"People s war","the weak defeats the strong", are not only magic weapons for defeating the enemy during the period of revolutionary war ,but also have profound practical significance in market competitions today.
他提出的一系列包括人民战争、以弱胜强等思想不仅在革命战争时期是克敌制胜的法宝,而且在市场经济条件下同样具有现实意义。