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 .

文章提出具有中性X(X≠{x})X双枝模糊决策概念和决策优化分析模型、决策定定理、决策识别定理、决策去余定理和决策因素X挖洞原理。