nark

noun

1. 警察的线人
   a person who is friendly with criminals and who gives the police information about them

1. The paper reports test results of fine coal flotation with NARK collector instead of diesel oil and it points in the paper that application of the new collector can effect optimization of coal flotation system and improvement of clean coal yield and economic benefit.
   介绍了纳尔科新型捕收剂替代柴油作煤泥浮选捕收剂的应用试验结果，指出新型捕收剂的应用可实现浮选系统的优化和浮选精煤产率与经济效益的提高。

noun

1. a lawman concerned with narcotics violations

   Synonym:    narcnarcotics agent

2. an informer or spy working for the police

   Synonym:    copper's nark

verb

1. inform or spy (for the police)

2. cause annoyance in
   1. Mosquitoes buzzing in my ear really bothers me
   2. It irritates me that she never closes the door after she leaves

   Synonym:    annoyragget tobotherget atirritaterilenettlegravelvexchafedevil