These decomposition products often contain virulent poison even trace it can make up of a serious threat to the lives and safety of the staff entered the room .

这些分解产物中往往含有 剧毒，即便是微量，也会对对进入室内的工作人员的安全和生命构成严重威胁。

These he had boiled down into a yellow liquid quite unknown to science which was probably the most virulent poison in existence .

他把这些毒草熬成一种黄色的液体，什么科学家都没有见识过的，大概是世界上最 毒的一种 毒药了。