Macdougallin
仙人掌甾醇, 甲(基)胆甾烯二醇
🗣️ 情景例句
I'm sorry, Carl.
很抱歉 Carl。
It took him a long time to make up his mind.
下决心花了他很长时间。
Long ago, people believed that the world was flat.
很久以前人们相信地球是平的。