adj.单眼用的；单目的，单筒（孔）的
n.单筒望远镜

I use a monocular to observe the birds in the distance.
我使用单筒望远镜观察远处的鸟。
The hiker always carries a monocular in case he spots something interesting.
这个徒步旅行者总是带着一个单筒望远镜，以防他发现什么有趣的东西。
A monocular is more compact and lightweight than a pair of binoculars.
单筒望远镜比双筒望远镜更小巧轻便。
The spy used a monocular to monitor the target's movements from a distance.
间谍使用单筒望远镜从远处监视目标的行动。
My grandfather gave me his old monocular when I started birdwatching.
当我开始观鸟时，祖父给了我他的旧单筒望远镜。
The telescope is actually a high-powered monocular with advanced optics.
望远镜实际上是一个具有先进光学系统的高倍率单筒望远镜。
The ranger recommended using a monocular for wildlife viewing instead of a camera with a zoom lens.
管理员建议使用单筒望远镜观看野生动物，而不是使用带变焦镜头的相机。
Monoculars are often used by hunters to spot game from afar.
单筒望远镜常被猎人用来从远处发现猎物。
The sailor kept a monocular at hand to scan the horizon for other ships.
水手手头总是备着一个单筒望远镜来扫视地平线上的其他船只。
With the help of a monocular, we were able to identify the constellations in the night sky.
在单筒望远镜的帮助下，我们能够识别夜空中的星座。