nonradioactive例句

Isn't the nonradioactive form of thallium used for rat poison?.
铊的非放射性形态不是用于制造老鼠药吗？

Isn't the nonradioactive form of that used for rat poison?
铊的非放射性形态不是用于制造老鼠药 吗 ?

• #nonradioactive