In the stable British model, if a political party is too radical, it will lose the political center in the next election. The parties’ rivalry is healthy, though there is a built-in tendency to seek solutions that command a broad social consensus.
按照稳定的英国模式，如果哪个党过于极端，在下界选举里它就会被迫离开权力中心。两党对立不是什么坏事，但按惯例，两党通常都有意愿寻求具备广泛社会共识的政策方案。然而，这种制度后果并不一定会出现（哪怕在当今的英国，它大概也维持不了多久了）。