spy on

US /spaɪ ɑːn/
UK /spaɪ ɑːn/
"spy on" picture
1.

监视, 侦察

to secretly watch someone or something, especially to obtain information

:
The government was accused of trying to spy on its own citizens.
政府被指控试图监视自己的公民。
She felt like someone was spying on her.
她感觉有人在监视她。