在学校的时候,从大二到大四,我不但当过数学家教,也在餐厅当过服务员。
zài xuéxiào de shíhou ,cóng dàèr dào dàsì ,wǒ bùdàn dāng guò shùxué jiājiào ,yě zài cāntīng dāng guò fúwùyuán 。
When I was in school, from sophomore to senior year, I was not only a math tutor, but also a waitress in a restaurant.