Wai guo shui e kou di=: Xiao chu guo ji zhong fu ke shui zhi du zhi yan jiu/ Wo guo jiao yu ji hua zhong jian jiao he zuo zhi du zhi yan jiu/ Nei bu kong zhi=: Qi ye zheng ti kong zhi zhi du zhi yan jiu/ Shi jie ge guo zhong xue jiao yu zhi du=: Wo guo chu ji zhong xue jiao yu zhi du zhi yan jiu/