Definite ducts
[医] 直乳管
🧩 词语组成解析
n. 通风管道；管道（duct的复数）
🗣️ 情景例句
Six table lamps. Three end tables. One piano.
六个灯。三张茶几。一 钢琴。
A man can not spin and reel at the same time.
一心不能二用。
The winch was again put into operation and one of the men started up the truck.
绞盘机再次启动，一位工人发动了急修车的引擎。