Gemmology
n. 宝石学
🗣️ 情景例句
Thanks, Mom.
谢谢 ，妈妈。
Choose an author as you choose a friend.
选书如择友。
While we were having breakfast, our little boy, Tommy, found two small coins on the floor.
正当我们吃早饭时，我们的小男孩汤米在地上找到两枚小硬币。