spyglass
n. 小望远镜
1. a small refracting telescope
The spyglass contains a lens.
这个小望远镜含有一个透镜.
We the boats at the mouth of the second river, then began to climb Spyglass Hill.
我们把小船停在第二条河的河口处上岸, 然后开始爬望远镜山.
telescope