Police keep track of the kidnapper using electronic surveillance equipment.

警方利用电子监视设备跟踪绑架者。

柯林斯例句

He added that the missing hologram should have been detected by electronic surveillance.

他还说,电子监视设备本应该发现漏印了全息防伪标志.

《简明英汉词典》

An electronic surveillance camera was installed to watch his activities.

他们装了一台电子监测器监视他的一举一动.

互联网

An electronic surveillance camera was watch his activities.

他在摄像机面前表现得很自然.

互联网