地板的不平整让桌子摇晃不稳。

The ___unevenness of the floor made the table wobble.

这张桌子的表面有些不平整。

There is some ___unevenness on the surface of this table.

老师注意到学生之间成绩的差异明显反映了教育资源分配的不均衡。

The teacher noticed that the ___unevenness in students' grades clearly reflected the imbalance in educational resources.