irregular
- n. 不规则物；不合规格的产品
- adj. 不规则的；无规律的；非正规的；不合法的
考试真题
- Cairo is known for its overcrowded roads, irregular driving practices and shaky old vehicles, but also for its air pollution.
出自-2015年12月听力原文
- Sasaki re-ran the experiment while presenting the sleeping participants with a mix of regularly timed of the same tone and irregular beeps of a different tone during the night.
2017年12月四级真题（第一套）阅读 Section C
- She worked out that, if the left hemisphere was staying alert to keep guard in a strange environment, then it would react to the irregular beeps by stirring people from sleep and would ignore the regularly timed ones.
2017年12月四级真题（第一套）阅读 Section C
- We have John standing by the time clock, and he swears he saw nothing irregular.
2016年12月四级真题（第一套）听力 Section B