crop up困难

With no video production costs, illegal streaming sites have achieved profit margins approaching 90%, according to the Motion Picture Association (MPA), a trade group representing Hollywood studios that’s working to crack down on the thousands of illegal platforms that have cropped up in recent years.

据美国电影协会（MPA）称，由于没有视频制作成本，非法流媒体网站的利润率已接近90%；美国电影协会是代表好莱坞各制片公司的行业组织，正致力于打击近年来涌现的数以千计的非法平台。