Dena
[医][=diethylnitrosamine]二乙基亚硝胺
🗣️ 情景例句
Wrong number.
打错号码。
She feels shy about meeting Frank for the first time.
她对于第一次和弗兰克约会感到难为情。
the varieties are infinite; but two classes may be roughly seen.
鸟的飞行方式千差万别，但大体上可分为两类。