Spy upon sb
暗中监视某人, 侦查某人
🧩 词语组成解析
upon
[ə'pɑn]
prep. 在…上面;当…时候;
[计] 栈底, 标准二进制, 减, 备用设备\\n[医] 锑(51号元素)
🗣️ 情景例句
I can understand that.
我们能理解。
He has pamphlet.
他有一本小册子。
It looks as if it hasn't been washed following the instructions.
这看起来没按说明来洗。