I could think of nothing but these ventilation shafts.

我只能想这些空气调节筒，却想不什么别的东西。

Walking through the town, you'll see chimneys and ventilation shafts poking out of the ground.

穿过小镇，你会看和通风从地面来。

And a ventilation shaft that clears the air can become the center of mysteries and conspiracies.

而净化空气的通风也可能成为神秘和阴谋的中心。

I figured it was a safety measure to prevent curious urbanites from accidentally electrocuting themselves or falling down a ventilation shaft.

我认为这是一种安全措施，可以防止好奇的城市居民意外触电或从通风坠落。