| 释义 |
Phr V spy upon spies, spying, spied spy on/upon sb/sth to watch someone or something secretly in order to discover information about themI think my neighbours have been spying on me.He was arrested for spying on American air bases.
! Spy upon is more formal than spy on, and is mostly used in writing.
spy on/upon sb/sth to watch someone or something secretly in order to get more information about them: Carey spied on US diplomats and military officials in Berlin. 'Harriet the Spy'' is a popular children's novel about an 11-year-old girl who spies on her friends and neighbours.
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