lethal dose

例句：

1. 1.The drug had a lethal dose of 0.5 mg per kilogram of body weight.
   该药物对体重为每公斤0.5毫克的人具有致命剂量。
2. 2.The researcher found that the lethal dose for this poison was only 0.01 mg per kilogram of body weight.
   研究人员发现这种毒药的致命剂量仅为每公斤体重0.01毫克。
3. 3. The scientist warned that exposure to this substance could result in a lethal dose withinminutes.
   科学家警告说，暴露于这种物质可能会导致几分钟内致命剂量。