Ramsden eyepiece

例句：

1. 1. The scientist used a Ramsden eyepiece to observe the stars.
   这位科学家使用拉姆森目镜来观察星星。
2. 2.The astronomer was using a Ramsden eyepiece to study the moon's surface.
   天文学家正在使用拉姆森目镜研究月球的表面。
3. 3.The doctor recommended the patient to use a Ramsden eyepiece for his vision correction.
   医生建议病人使用拉姆森目镜进行视力矫正。