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
Are you sure you know where you're going?
你真认识你要去的地方吗？
Thank you very much for giving us your valuable time.
我们占用了你宝贵的时间，非常感谢。
It's Sunday today.
今天是星期天。