binoculars

船长正用双筒望远镜巡视海面。

The captain is using ___binoculars to observe the sea.

我用双筒望远镜观察远处的山峰。

I used ___binoculars to observe the distant mountains.

他举着望远镜看远处的山峰。

He held the ___binoculars to look at the distant mountain peaks.