国际 na xie guo ji qi kan shu yu s s c i
外国 na xie wai guo qi kan shu yu s s c i
哪个国家 o p t i k qi kan shu yu na ge guo jia
德国 qi kan de guo f e b shu yu s c i me
s c d shu yu guo nei he xin qi kan
国际 s c i du shu yu guo ji qi kan ma
国际 s c i e lun wen shu yu guo ji qi kan