Levophanol
[药]左吗南(商品名, 左旋-3-羟-N甲基吗啡烷, 止痛药)
🗣️ 情景例句
I'm afraid you're right.
恐怕你对了。
An idle youth,a needy age.
少壮不努力，老大徒伤悲。
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。