Organic nitrogen
[医] 有机氮
🧩 词语组成解析
🗣️ 情景例句
I haven't seen you for a long time.
很久没见了。
How I wish the vacation would last longer!
如果假期长一点那该多好。
For hundreds of years, St.Bernard dogs have saved the lives of travellers crossing the dangerous Pass.
几百年来，圣伯纳德修道院驯养狗拯救了许多翻越这道山口的旅游者的生命。