Lab studies have shown that when mosquitoes bite a person recently treated with the drug, they swallow a dose that is sometimes lethal to them.

实验室的研究已显示，当蚊子叮咬了近期接受该药治疗的人后，它们吸入的剂量有时是致命的。

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It's a day Jackson's father marked by filing a wrongful death lawsuit against the doctor charged with giving his son a lethal dose of sedatives.

杰克逊父亲也在这一天将他的心理医生告上法庭，称正是医生所开的致命剂量的镇定剂致其儿子的死亡。

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Prosecutors said he acted with "gross negligence" and gave Jackson a lethal dose of the sedative propofol that caused his death in June 2009.

起诉者说他犯了“严重过失”，给杰克逊误用了致命剂量的镇静剂异丙酚，导致他2009年6月的死亡。

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During the trial, Dr Murray's lawyers argued that Jackson self-administered a lethal dose of the drug while he was out of the room.

BBC: Conrad Murray guilty of Michael Jackson manslaughter

Even at the elevated levels found off the coast, the amount of caffeine is well below a lethal dose for marine life, Portland State said.

CNN: Researchers find caffeine in waters off Oregon

Prosecutors said Gosnell had run a filthy "house of horrors" with unqualified staff - including those who administered a lethal dose of sedatives to Karnamaya Mongar, a 41-year-old refugee from Nepal.

BBC: Kermit Gosnell guilty of three murders in late-term abortions - BBC News