如是key就惯the了：The key factors of port development in China: 副标题From the perspectives of competition and cooperationorPerspectives on Cooperation and Competition（这是某书的副标）
你的题目很好，或者改一点点：Key considerations in port development in China: from the perspective of cooperation and 我觉得considerations 比 factors 更有 “学术性”，把 “合作” 放在 “竞争” 前面让文章有比较正面的感觉。
