核心 he xin qi kan you gong tong di yi ma
he xin qi kan you gong tong yi zuo ma
有用吗 qi kan j n p gong tong yi zuo you yong ma
共一吗 suo you qi kan du ke yi gong yi ma
有用吗 t o p qi kan gong yi di er you yong ma
中文 zhong wen he xin qi kan you gong yi ma
中文 zhong wen qi kan you gong tong di yi ma