C2 not level, equal, flat, or continuous不平整的；参差不齐的；不平等的；不平坦的；不连续的
The patient's breathing was quick and uneven.
The uneven floorboards creaked when you walked across them.
His teeth were yellow and uneven.
an uneven distribution of financial resources
Their rates of development are uneven.
different in quality; often used to avoid saying bad（质量）不稳定的，时好时坏的