Trimethyl
三甲基色氨酸, 刺桐子氨酸
🗣️ 情景例句
How long does it take you to get through a letter?
你写一封信要花多少时间？
He admitted his guilt to the police.
他向警方承认犯罪。
Are you going to make another?
您准备再拍一部吗？