ershisi sui means twenty-four years of age wo shi yanjiusheng means I am a research student wo xue shuxue means I am studying mathematics wo laizi Nanjing means I am from Nanjing wo de zhuanye shi jingji means My subject is economics ta zai yinghang shangban means He works at a bank women you yi ge erzi means We have son ni you xiongdijiemei ma? means Do you have brothers and sisters? ta you yi ge jiejie he yi ge didi means She has an order sister and a younger brother. wo shi dushengzi means I am a lone child ni you shushu ayima means do you have uncles and aunts? ni duo da le means How old are you? ni ji sui le means How old are you? wo fuqin tuxiu le,wo mama hai gongzuo. means My father has retired,my mother still works.

Please eliminate some errors. Plenty of errors. Some are written in the comment.

Amanda: he is 21 this year, the mistake above is "at" mean ta same thing next lines su ning: ta xue shenme zhuanye