And you think: " What's going on? You know, something fishy. Something a bit unusual, a bit strange. It's not the normal atmosphere." Okay.

你想：“这是怎么回事？你知道，有些可疑。有点不寻常，有点奇怪。这不是正常的气氛。”好的。

Carbon monoxide is measured in parts per million in a normal atmosphere. Breathing in 200 parts per million of carbon monoxide will cause the first signs of poisoning.

在正常大气中，一氧化碳的测量单位为百万分之一。吸入百万分之 200 的一氧化碳会导致中毒的最初迹象。