It all melted together into a lethal lava-like substance that poured through pipes and holes in the structure and solidified.

所有这些东西混在一起，融化成了致命的熔岩状物质，在建筑物的管道和孔洞里四下流淌，然后凝固。

youdao

The more common Lethal Dosage (LD) tests are used to determine the amount of a substance that will kill a predetermined ratio of animals.

通常的致死剂量测试(LD)被用来确定能够一次杀死动物的几率。

youdao

There are reports that they doctored bottles of soft drinks so the top half contained ordinary, non-lethal substance and the bottom half, the liquid explosives.

NPR: Inside the British Probe of the Terrorist Plot

We understand that suicide can be an impulsive act and that alcoholism, substance abuse and access to lethal means can increase its likelihood.

CNN: Why more Americans are dying of suicide

In her ruling, McMillan said that it was clear from the tape that Kevorkian intended to help Youk kill himself, that he delivered a controlled substance by injecting him with lethal doses of drugs and that his help in planing Youk's death proved premeditation.

CNN: Kevorkian Case: Kevorkian trial set