The more common LethalDosage (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。
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The dosage of interest is typically the lethal concentration, known as LC50, that will kill 50% of the population of organisms in a given period of time.