求翻译：这一时期，以继承孙中山先生遗志，以中华民族伟大复兴为已任的无产阶级政党是什么意思？

During this period, to inherit the Sun Yat-Sen's legacy, to the great rejuvenation of the Chinese nation as any of proletarian political parties--the Communist Party came into being, the road to Renaissance of Chinese nation a solid step forward.