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
Tony is a man of weak will.
托尼是个意志薄弱的人。
He is studying the ecology of ameba.
他在研究阿米巴
One hour and seventeen minutes passed and we had not even covered half the distance.
1小时17分过去了，走了还不到一半路程。