ducts

例句:

• Air ducts and electrical cables were threaded through the complex structure.
  通风管和电缆在这幢结构复杂的建筑物中穿过。
  
• Ducts and pipes crisscross.
  管道纵横交错.
  
• One of the air-ducts has become blocked.
  有一条输气管堵塞了。
  
• The breast is divided into ducts and lobules.
  来自BBC
• You seem to have enormous tear ducts in defending the undefendable.
  来自SA
• Was it passing through magnetospheric ducts?
  来自SA