East and West are still spying on one another.东西方仍在互相秘密监视。

That day he spied on her while pretending to work on the shrubs.那天, 他假装修剪灌木, 暗中监视她。

He had his wife spied on for evidence in a divorce case.他派人暗中监视他的妻子, 为离婚讼案搜集证据。