spyglass

The spyglass contains a lens.

这个小望远镜含有一个透镜.

《简明英汉词典》

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.

期刊摘选