Protoporphyrin
n. [化]原卟啉
🗣️ 情景例句
At 4, but I have to leave by 3:00 to get there on time.
四点，不过我三点必须离开，才能准时到那里。
We really appreciate your being our partners.
我们真诚地感谢你们成为我们的客户。
To my surprise, he gave me the money immediately.
令我惊奇的是，他立刻把钱给了我。