- 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月聽力原文
- 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月四級真題（第一套）閱讀 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月四級真題（第一套）閱讀 Section C
- We have John standing by the time clock, and he swears he saw nothing irregular.
2016年12月四級真題（第一套）聽力 Section B