Nitrobarite
[化] 钡硝石
🗣️ 情景例句
He is with someone right now. Would you hold?
他现在在会客。你可以稍等吗？
Could you tell me where is the first-aid room?
你能不能告诉我急诊室在哪里？
What are you then?
那你是什么国家的人呢？