Or some pandemic disease may break out in a heavily polluted area.

或有朝一日，某种流行病会在污染严重的地区爆发。

youdao

I fear I may find myself amid the debris of an earthquake one day. Or some pandemic disease may break out in a heavily polluted area.

我害怕有一天自己会被埋在地震的残骸中；或有朝一日，某种流行病会在污染严重的地区爆发。

youdao

With a lot of black smoke of the boiler chimneys in the well site, this area is heavily polluted.

由于从井场锅炉烟囱中冒出大量的黑烟，这个地区污染很严重。

youdao