I could think of nothing but these ventilation shafts.

我只能想到这些空气调节筒，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，你会看到通风从地头来。

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

而一个清理空气的通风口可能会成为神秘事件阴谋论的中心。

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

我想这是为了防止好奇的城市居民不小心触电或掉进通风口而采取的安全措施。