The soldiers undermined the wall.

士兵们在墙下挖洞。

In addition,the paper proposes decision judgement theorem,decision discernment theorem, decision surplusage discarding theorem and hole digging principle on decision factors universe X .

文章提出有性域X(X≠{x})X的上的双枝模糊决策的概念和决策优化分析模型、决策定定、决策识别定、决策去余定和决策因素域X上的挖洞。