blind sewer

例句：

1. 1. The city's sewers were clogged with garbage, making it difficult for people to access the streets.
   城市的下水道被垃圾堵塞，使得人们难以进入街道。
2. 2. The construction workers had to work in a blind sewer, where they could not see their surroundings.
   建筑工人不得不在盲下水道中工作，他们无法看到周围的环境。
3. 3. The blind sewer was filled with water and debris, making it dangerous for anyone who entered.
   盲下水道充满了水和杂物，任何人都不能进入。