战略传播管理：冷战后美国国际形象构建研究：an in-depth of U.S. image-building in the post cold war era 战略传播管理：冷战后美国国际形象构建研究：an in-depth study of U.S image-building in the post cold war era an in-depth of U.S. image-building in the post cold war era an in-depth study of U.S image-building in the post cold war era