- 凸凹不平: rough and uneven in surface
- 的: 4次方是 The fourth power of 2 i ...
- 不平的: asperous; bumpy; cobbly; craggy; discontent; grouchy; hummock; ragged; rough; uneven
- 凹凸不平的: accidented; broken; hairy; lumpy; ragged; rough; rugged; uneven
- 抱不平的: aggrieved; disaffected; malcontent
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