Nitrogenation
氮化作用
🗣️ 情景例句
If we hire you, how long will you stay with us?
你打算给我们工作多久？
Could you help me find my baggage?
请你帮我找我的行李好吗？
Happy birthday! said Polly, and gave Ann her present---a red feather.
“生日快乐！”波利说，然后给安送礼物--一根红羽毛。