实验室严格管制氰化物，因为它有剧毒。

The lab strictly controls ___cyanide because it's highly poisonous.

工厂在处理氰化物时采取了严格的安全措施。

The factory has strict safety measures when dealing with ___cyanide.

那名间谍在试图毒害一名特工时被抓。

The spy was caught trying to ___poison an agent.