translation.en: He puts in 80 parts per million hydrogen sulfide -- the same stuff that survived these past mass extinctions -- and he turns a mammal into a reptile.
translation.zh: 注入了百万分之八十的硫化氢—— 这种物质也是从过去物种大灭绝中存活下来的—— 然后哺乳动物就变成了爬行动物。