peeping disc

例句：

1. 1. The detective used a peep-hole to look into the room.
   侦探用窥视镜查看房间。
2. 2. She peeked through the peep-hole and saw a squirrel.
   她通过窥视镜看到了一只松鼠。
3. 3. He kept a peep-hole in his bedroom window for safety reasons.
   他出于安全原因在卧室的窗户上安装了窥视镜。