n.雙眼望遠(yuǎn)鏡

If I had binoculars, I could see that comet clearly. 如果我有望遠(yuǎn)鏡，我就可以清楚地看見那顆彗星。

He took out the binoculars and adjusted the focus. 他取出雙筒望遠(yuǎn)鏡并調(diào)整了焦距。

binoculars是復(fù)數(shù)形式的名詞，但表達(dá)的是單數(shù)概念，若表示數(shù)量，須用單位詞pair。如“一副雙筒望遠(yuǎn)鏡”是a pair of binoculars。

binoculars用作主語時(shí)，謂語動(dòng)詞應(yīng)該用復(fù)數(shù)形式。