Phosgene Gas – Mustard gas may have been dubbed the King of the Battle Gases, but when it comes to sheer lethality no other gas used in World War I could top Phosgene.

光气——芥子气可能被称为战斗气体之王， 但就绝对杀伤力而言，第一次世界大战中使用的任何其他气体都无法超越光气。