cooperative relation; cooperative relationship; collaborative relationships; cooperative structure; cooperative ties; cooperative alliance; partnership; close ties; hookup
両国は協力関係を築いてきた。
The two countries have built a cooperative relationship.
組織間の協力関係が崩れてプロジェクトが遅れた。
The breakdown of cooperation between organizations delayed the project.
新しい協力関係を構築するために交渉が始まった。
Negotiations began to build a new cooperative relationship.