Ooporphyrin
蛋壳色素, 蛋壳卟啉
🗣️ 情景例句
He started with them almost forty years ago.
他在那里做了快四十年了。
Scientists contribute to the well-being of mankind.
科学家为人类造福。
Tim is looking at an aeroplane.
蒂姆正望着一架飞机。