The Marxist philosophy of dialectical materialism has two outstanding characteristics. One is its class nature: it openly avows that dialectical materialism is in the service of the proletariat.

• 马克思主义的哲学辩证唯物论有两个最显著的特点：一个是它的阶级性，公然申明辩证唯物论是为无产阶级服务的；