“poisonous substance”造句，怎麼用poisonous substance造句

The system acts on useful medications in the same way as it does on poisonous substances.

Providing that safe tolerances be set for unavoidable poisonous substances.

For example, in the LD50 test, subjects are forced to ingest poisonous substances (through stomach tubes, vapor spray inhalers or injection) until half of them die.