schoolmate的用法和樣例：
例句
用作名詞 (n.)
- He met an old schoolmate at the party.
他在宴會上遇見了一位老同學。 - I recognise my primiary schoolmate Mary in the photo.
我從照片上認出了我小學時的同學瑪麗。 - Mary's brother is my schoolmate, but two years senior to my grade.
瑪麗的哥哥跟我是校友,只是比我高兩屆。
