"desires at variance with his duty"
"widely discrepant statements"
The intent is to remove the least amount of material possible while ensuring that all discrepant material is removed and the original design strength and durability are maintained. 去除少量材料的同时，应尽量确保所去除的是所有有差异的材料，并尽量保持初始设计的强度和耐久性。
Basic social assumptions may be so widely discrepant that communication becomes impossible.