n.直肠
A cataract is a painless, cloudy area in the lens of the eye that blocks the passage of light to the retina, the nerve layer at the back of the eye, usually causing vision problems.───白内障是指眼内晶状体的无痛性浑浊阻碍了光线到达视网膜(眼球后部的神经层)，从而引起视力问题。
The dogs followed me along the back passage.───狗跟着我走过后面的通道。
The hotel lies back of a dingy passage and forms a rectangle very much on the order of a modern penitentiary.───这家旅馆位于一条阴暗的小道后面，呈一个长方形，同一所现代罪犯教养所十分相似。
The water was all slippy-sloppy in the larder and in the back passage.───房子的储藏室和后面通道湿漉漉的，非常容易滑倒。
back passages───直肠
air passage───气道；通风槽
back pass───背传，后传
back passes───背传，后传
easy passage───方便通行
safe passage───安全通行，安全通道
back pressure───[机]背压；[力]回压；[内科]反压
safe passages───安全通行，安全通道
air passages───气道；通风槽