floating reticle

例句：

1. 1.The hunter used a floating reticle to track the deer's movement.
   猎人使用一个浮动瞄准器来追踪鹿的移动。
2. 2.The pilot adjusted his altitude using a floating reticle.
   飞行员通过一个浮动瞄准器调整了他的高度。
3. 3.The astronaut was able to spot the target with the help of a floating reticle.
   宇航员借助一个浮动瞄准器成功地发现了目标。