Tetramyl
四环素亚甲赖氨酸
🗣️ 情景例句
Who's the valedictorian of this class?
谁是班里优秀的毕业生？
Don't answer back.
不要顶嘴。
I left at 6:00 so that I could catch the train.
我六点钟出门，以便赶上火车。