eyepiece cap

例句：

1. 1.The scientist used a special eyepiece cap to adjust the focus of his microscope.
   这位科学家使用一个特殊的目镜盖来调整显微镜的焦点。
2. 2. The doctor advised the patient to wear an eyepiece cap while using the microscope.
   医生建议病人在使用显微镜时戴上目镜盖。
3. 3.The engineer found that the eyepiece cap was causing some interference with the image quality.
   工程师发现目镜盖引起了一些图像质量的干扰。