Chesterian
[地质]契斯特群
🗣️ 情景例句
Good afternoon, Mrs. Martin. I've come to see Mr. Martin.
您好，马丁夫人。我来看看马丁先生。
My sister worked as a secretary before she got married.
在她结婚了以前，我的姐姐为一位秘书。
Columbus discovered America in l492.
哥伦布于1492年发现了美洲。