spy upon的用法和樣例：
例句
- He often went to spy on her, but he never dared to let her see him.
他經(jīng)常窺探她的行動(dòng)，但從未敢讓她發(fā)現自己。 - One morning, this spy saw Jean Valjean, with an air which struck the old gossip as peculiar, entering one of the uninhabited compartments of the hovel.
有一天早晨，這個(gè)蓄意窺探的老婆子看見(jiàn)冉阿讓走進(jìn)這座破屋的一間沒(méi)有人住的房里去了，覺(jué)得他的神氣有些特別。
