Comparative research of technological thoughts between Marx and Heidegger Comparative research on philosophical views of Marx and Heidegger Comparative research on the thoughts of Marx and Engels 并列题名：Comparative research on philosophical views of Marx and Heidegger Ecological justice research on ecological thought of Marx and engels Comparative research on social security system between the US and Sweden Ecological justice research on ecological thought of Marx and Engels Comparative Research on Televison Drama between China and America 并列题名：Comparative research on the thoughts of Marx and Engels 并列题名：Comparative research on social security system between the US and Sweden