irregularity
noun uk/ɪˌreɡ.jəˈlær.ə.ti/ us/ɪˌreɡ.jəˈler.ə.t̬i/
(SHAPE)
[ C or U ]不规则；不整齐
the quality of not being regular in shape or form, or an example of this
The pictures showed cracks and other irregularities in otherwise perfectly regular crystals. 这些图片表明：除了一些裂缝及凹凸不平之处，这些等轴晶系晶体无可挑剔。
The west of the island is famous for the irregularity of its coastline. 岛的西部因其曲折的海岸线而著名。
(RULE)
[ C or U ]违规；不合常规
something that is not correct or acceptable
The inspectors found several irregularities in the business accounts. 检查人员在业务账目中发现了几处违规。
The irregularity of (= the lack of rules for) English spelling means that it is easy to make mistakes. 英语拼写没有规律可循意味着很容易拼错。
(TIME/SPACE)
[ U ]不定期;无规律
the fact that something does not happen at regular times