Petn
[医] 四硝酸戊赤藓醇[酯], 四硝酸戊四醇[酯], 长效硝酸甘油
🗣️ 情景例句
What's that, Mr. Carlson?
什么事， Carlson先生？
What is the total circulation of this weekly magazine.
这家周刊总发行量多少？
Mother, can we cook the food now, please? she said. I'm worried about my party.
“妈妈，请问现在我可以做吃的东西了吗？”她说，“我担心我的聚会。”