单目镜的

例句：

1. 1. The scientist used a single eyepiece to observe the experiment.
   科学家使用单目镜来观察实验。
2. 2. He had a single eyepiece in his glasses, which made him look very smart.
   他的眼镜里有一只单目镜，让他看起来很聪明。
3. 3. The astronaut wore a single eyepiece on his helmet for safety reasons.
   宇航员在头盔上戴了一只单目镜，出于安全原因。