national isolationism

例句：

1. 1. The country's national isolationism is a major obstacle to its economic development.
   该国的民族主义孤立主义是其经济发展的主要障碍。
2. 2. The isolationist policies of the past few decades have had a profound impact on global trade.
   过去几十年的孤立主义政策对全球贸易产生了深远影响。
3. 3.The isolationist movement has been gaining momentum in recent years, with many countries adopting similar policies.
   近年来，孤立主义运动正在兴起，许多国家采纳了类似的政策。