Definition
间谍 (jiàn dié) is the standard term for a spy — someone who secretly gathers information for a government or organization. 底线 (dǐ xiàn) can also mean 'informer, plant' in espionage contexts, but it specifically refers to a mole placed inside a target group, and it also has the unrelated meaning 'bottom line'. Use 间谍 for the general concept of a spy.
noun
spy
Examples
- 间谍。Nà wèi jiàn dié zuìhòu bèi fāxiàn le.That spy was finally discovered.
- 间谍。Diànyǐng lǐ de jiàn dié shēnfèn fēicháng yǐnmì.The spy's identity in the movie was very secret.
- 。Zhèngfǔ pòhuò le yí gè jiàn dié wǎngluò.The government uncovered a spy network.
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