an investigation into the living state of Wen Zhengming 文墨人生：文徵明的生活状态考察：an investigation into the living state of Wen Zhengming an investigation into the origin and purpose of moral concepts an investigation in Le street in China Investigation into the case of the poisoned Wang Ming an investigation into Venuti's translation theory 并列题名：Investigation into the case of the poisoned Wang Ming an investigation into Apel's ethics of discourse an investigation from the perspective of the Silk Road an investigation into the love, marriage and family conditions of Shenzhen in 2003