1.用管道往下輸送They had piped the water down. 他們已用管道把水引到下面。
2.吹哨讓(水手)下班It's time to pipe the sailors down. 該吹哨通知水手們下班了。
3.【口】安靜; 閉嘴She told the children to pipe down while she was talking on the telephone. 她告訴孩子別吵了, 她正在打電話。Pipe down! I'm listening to the church bell. 安靜!我在聽教堂的鐘聲。
磨損; 損耗; 用壞, 用舊The feet of countless visitors wore down the threshold of the old building. 無數遊客的腳步磨損了這座古老建築物的門檻。Your back tyres are badly worn down. You should fit new ones. 你的後車胎磨損得很厲害, 你得換新胎了。