I'm going to see an old schoolmate of mine.

　　我去見(jiàn)一個(gè)老校友。

　　My father still keeps in touch with his old schoolmate.

　　我父親仍和他的老同學(xué)保持聯(lián)系。

　　He started the magazine with a schoolmate

　　他和一個(gè)同學(xué)創(chuàng)辦了那份雜志。

　　On my graduate student's time, an schoolmate's paper discussed this topic.

　　我上研究生的時(shí)候一個(gè)同學(xué)論文就是做的這個(gè)題目。

　　10 years after graduation, he could hardly recognize his old schoolmate.

　　畢業(yè)10年后，他幾乎認(rèn)不出他以前的同學(xué)了。