qíng / huà / jiǎ / shì / jù / dú / huà / xué / pǐn / bì / xū / yóu / zhuān / yè / rén / yuán / yán / gé / bǎo / guǎn

氰化钾是剧毒化学品，必须由专业人员严格保管。

Potassium cyanide is a highly poisonous chemical and must be strictly controlled by professionals.