中非高校20+20合作计划 20+20 Cooperation Plan for Chinese and African Institutions of Higher Education ; the 20 plus 20 cooperation plan for Chinese and African institutions of higher education

中国的歼-20 China’s J-20

里约+20大会 he Rio+20

运-20（大型运输机） Y-20 heavy transport aircraft

chromosome 20 号染色体

班得瑞20周年精选集 Bandari 20th Collection ; Bandari 20th Anniversary Collection

女子20公里竟走 Women's Athletics 20km Walk

闪闪生辉20首 SACD

relax 20 hours 放松 ; 休息