Dictionary entry
undercover agent
卧底特工；秘密特工
a secret agent hired by a government or business to obtain confidential information about enemies or competitors
- 1.
(military) a secret agent hired by a state to obtain information about its enemies or by a business to obtain industrial secrets from competitors
In use
The police sent an undercover agent to the meeting to gather evidence.
She worked as an undercover agent for several years before her identity was revealed.
The company hired an undercover agent to find out who was leaking its industrial secrets.
work as an undercover agent
He worked as an undercover agent for five years.
他当了五年的卧底特工。
act as an undercover agent
She acted as an undercover agent to infiltrate the gang.
她作为卧底特工潜入黑帮。
become an undercover agent
After training, he became an undercover agent.
训练结束后，他成了一名卧底特工。
Common mistakes
He is undercover agent.He is an undercover agent.
英语中可数名词短语如“undercover agent”前需要冠词，而汉语没有冠词，学习者容易遗漏。
He works like an undercover agent.He works as an undercover agent.
“work as”表示实际担任的职务，“work like”表示方式相似；中文“像...一样工作”容易导致混淆。
Connections
Learner notes
Grammar Note
常与动词 act as, work as 搭配
Dictionary facts from ECDICT, WORDNET.