recalcitrant

该现象顽固地抵抗简单的解释。

The phenomenon is ___recalcitrant to simple explanation.

那个倔强的幼儿双臂交叉坐在超市地板上不肯动，尽管她母亲的劝说越来越急促绝望。

The ___recalcitrant toddler crossed her arms and sat down on the supermarket floor, refusing to budge despite her mother's increasingly desperate pleas.

那头倔强的骡子把蹄子扎在土路上，无论怎么拽怎么哄都不肯往前迈一步。

The ___recalcitrant mule planted its hooves in the dirt path, and no amount of tugging or coaxing could make it take a single step forward.