The cells have different sides, and one side must face the wall of the duct and the other must face the inner channel.

细胞有不同的侧面，并且有一个侧面一定要朝向导管壁，而其他的侧面一定要朝向内部通道。

youdao

The world's ultimate record-breaker, New Yorker Ashrita Furman, holds 127 records, though his record for duct taping a person to a wall is now in German hands.

保持世界纪录最多的人是纽约人艾什力塔·弗曼。尽管将自己用胶带粘在墙上用时最短记录现在已经被德国人打破了，但他仍然拥有127项记录。

youdao

Duct branch is rich in natural form of uniform distribution, wall smooth, branch pipe and tube diameter on the transition to a flat.

导管分支丰富，形态自然，分布均匀，管壁光滑，分支导管与上一级导管管径过渡平缓。

youdao

So we tried a temporary solution we had radiologists place a plastic drain, using X-ray guidance, through his abdominal wall and into the severed duct in order to draw the leaking bile out of him.

NEWYORKER: The Checklist

Improvements could include attic and wall cavity insulation, high-efficiency windows and appliances, duct-sealing, or rooftop solar.

FORBES: California Program Eliminating Upfront Cost Of Energy Upgrades To Launch For Businesses

There's a second alternative: A growing number of New Yorkers are going for duct-free AC systems that involve a small, wall-mounted indoor fan powered by a separate outdoor unit the size of suitcase.

WSJ: Ugliness for All