He had no knowledge of what a fatal dose might be.

他不知道致死的剂量是多少。

youdao

The fatal dose of radiation for a human is 6 sieverts.

6西弗特辐射对人类就可以致命。

youdao

The threshold level at which some kind of reaction can occur may be less than a thousandth of a potentially fatal dose, so where do you draw the line?

可能发生某种反应的临界值也许不到可能致命剂量的千分之一，那么，你在哪里划这条线呢？

youdao

Murray's finances were not a factor in the criminal case that ended with his 2011 conviction for administering a fatal dose of propofol to Jackson.

NPR: Jackson's Private Life On Display In Civil Trial

Not only would this have caused radiation sickness, but without rapid medical treatment such a sudden dose could have been fatal.

BBC: NEWS | Science/Nature | Spacecraft go to film Sun in 3D

Prof Ferner said the lower dose was appropriate for a frail elderly lady, while the higher dose would have been fatal.

BBC: Gladys Richards