I could think of nothing but these ventilation shafts.

我只能想到这些空气，却想不出什么别的东西。

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

穿过小镇，你会看到烟囱通风从地面探出头来。

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。