Demecycline
去甲四環(huán)素
??? 情景例句
They're real watches. They tell you the time, don't they?
當然是"真的表"羅。會走也會報時，不是嗎？
For here or to go?
在這兒吃還是帶走？
She's next door.She's in her office, sir.
她在隔壁，在她的辦公室里，先生。