Ooporphyrin
蛋壳色素, 蛋壳卟啉
🗣️ 情景例句
Yes, both. Last trip I fished a little and hiked three miles.
是的，两者都做。上次出去时，我钓了一会儿鱼，又步行了三英里。
Old wood is best to burn, old horse to ride.
老柴好烧，老马好骑。
Mr. Smith is in charge of this class.
史密斯老师负责该班。