crescent beam

例句：

1. 1.The moon casts a crescent beam on the lake.
   月亮在湖上投下一道新月形的光束。
2. 2. The astronaut captured a crescent beam of sunlight during their journey.
   宇航员在旅行中捕捉到了一束新月形的阳光。
3. 3.The scientist observed the crescent beam of the sun through his telescope.
   科学家通过望远镜观察了太阳的新月形光束。