莎拉：我毕业于北京大学。
我毕业于北京大学，获得了经济学硕士学位。
I attended Peking University and received my master's degree in Economics.
我毕业于北京大学，主修专业是会计与统计。
I graduated and obtained a diploma from Peking University with a major in accounting and statistics.
我毕业于北京大学。
我毕业于北京大学。
我2003年毕业于北京大学，获计算机专业学士学位。
I graduated from Beijing Universityin 2003, and hold a Bachelor of Science degree in Computer Science.
罗睿的哥哥是我最好的朋友，3年前毕业于北京大学。
Luo Rui's elder brother, who is my best friend, graduated from Peking University 3 years ago.
罗睿的哥哥是我最好的朋友，3年前毕业于北京大学。
Luo Rui's elder brother, who is my best friend, graduated from Peking University 3 years ago.
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