当我们想要看鸟正在干什么的时候，双筒望远镜或野外望远镜用处很大。

Binoculars or field glasses are a great help when we want to see what birds are doing.

youdao

当我们想要看鸟正在干什么的时候，双筒望远镜或野外望远镜用处很大。

Binoculars or field glasses are a great help when we want to see what birds are doing.

youdao