Physeptone
6-二甲氨基-4, 4-二苯基庚子酮盐酸盐
🗣️ 情景例句
when the dog scratched on the front door.
当那狗在抓前门时。
Don't forget to print airmail on the letter.
不要忘记在信封上印上航空邮件
When are you leaving?
你什么时候离开？