eyepiece of level tube

例句：

1. 1.The scientist used a microscope to examine the eyepiece of the specimen.
   科学家使用显微镜检查了标本的目镜。
2. 2.The camera's eyepiece is too small for the subject to see clearly.
   相机的目镜太小，无法让主体看得清楚。
3. 3.The astronaut had to adjust his eyepiece to get a better view of the starry sky.
   宇航员不得不调整他的目镜，以便更好地观察繁星点点的夜空。