Calar
甲基胂酸钙
🗣️ 情景例句
Dr. Tyler's office. Good morning.
早上好，泰勒医务所。
When did you ener the school?
你什么时候入学的？
Ships may be delayed by storms; flights may be cancelled because of bad weather, but trains must be on time.
轮船船期可能因风暴而推延，飞机航班可能因恶劣天气而取消，唯有火车必然是准点的。