在线教育平台成为了知识的普及者，让偏远地区的学生也能获得优质课程。

Online education platforms have become a powerful ___democratizer of knowledge, enabling students in remote areas to access quality courses.

免费在线教育平台成为了知识普及的平等推动者，使更多人能够获取优质教育资源。

Free online education platforms serve as a ___democratizer of knowledge, making quality education accessible to more people.