用“poisonous substance”造句大全,poisonous substance造句
Providingthatsafetolerancesbesetforunavoidablepoisonoussubstances.Thesystemactsonusefulmedicationsinthesamewayasitdoesonpoisonoussubstances.Forexample,intheLD50test,subjectsareforcedtoingestpoisonouss...