eye unit

例句：

1. 1. The camera has a small eyepiece for close-up shots.
   这台相机有一个小型的目镜用于近距离拍摄。
2. 2. The scientist used an eyepiece to observe the microscope.
   科学家使用一个目镜来观察显微镜。
3. 3. The eyepiece was damaged during the accident and had to be replaced.
   目镜在事故中受损，不得不更换。