WTO 世贸组织World trade organization
WHO 世卫组织World Health organization
CET大学英语等级考试College English Test
OPEC 石油输出国组织Organization of petroleum Exporting countries
UK 英国 United Kingdom
USA 美国 United States Of America
WTO 世贸组织World trade organization
WHO 世卫组织World Health organization
CET大学英语等级考试College English Test
OPEC 石油输出国组织Organization of petroleum Exporting countries
UK 英国 United Kingdom
USA 美国 United States Of America