duct
noun [ C ] uk/dʌkt/ us/dʌkt/
管道，管线；（人体的）管，导管
a tube or pipe that carries liquid or air, especially in and out of buildings or through the body
Most office buildings have dozens of air ducts and vents. 大多数办公楼都有很多通风管道和通风口。
People with blocked tear ducts cannot cry. 泪管阻塞者流不出眼泪。