1·Ducts and pipes crisscross.
管道纵横交错。
—— 《新英汉大辞典》
2·In forced-air heating and cooling systems, ducts carry hot or cold air to different parts of home.
在强制热风和冷风系统中，通风管道将热空气的冷空气输送到家里不同的地方。
3·Additional bracing, extra cooling ducts and special aerodynamics are fitted to the Super Sport, so that safety and stability are not sacrificed for top speed.
此外，还配备了额外的支撑装置，冷却管道和特殊的空气动力学系统。所以，威龙的高速并没有以牺牲安全性和稳定性为代价。
4·We each had the same undifferentiated external equipment (a bud of tissue), plus two sets of internal ducts.
我们都只是同样没有分化的外部器件(一个牙状组织)，加两套内部管道。
5·The water flows in ducts through concrete beams, and cool air descends upon the toiling masses from cold water radiators in the ceilings.
水在混凝土梁里面的管道流动，进入天花板的冷水散热器，冷空气从天花板的冷水散热器散发到上班人员的头上。