Medullas
n. 髓, 髓鞘, 髓质
🗣️ 情景例句
During our stay in London, we visited Buckingham Place.
我们在伦敦逗留期间参观了白金汉宫。
The mailman is delivering letters.
邮差在发信。
I get to school at about 7:30 every day.
我每天七点半到校。