fraternal twin
noun [ C usually plural ] uk/frəˌtɜː.nəl ˈtwɪn/ us/frəˌtɝː.nəl ˈtwɪn/
异卵双胞胎
either of two people born to the same mother at the same time who came from different eggs, may be of different sexes, and do not always look similar
Synonym: non-identical twin
Compare: dizygotic