Involved in the dissemination of the audience (consumers) must first apply through the network to become "test-off, and then to get the free trial opportunity."

参与传播的受众(消费者)必须先通过网络申请成为“试客”，然后才能获得相应的免费试用机会。

youdao

By providing free access to anyone with an Internet connection, MOOCs facilitate the dissemination of knowledge to unprecedented numbers of people.

FORBES: MOOCs: A College Education Online?

Staff needed to be convinced that this accorded with the school's philosophy of open dissemination of knowledge and information, and the local education authority's historic reluctance to endorse free software had to be overcome.

BBC: Schools' computer costs have been rising