co-operation
US /koʊˌɑp.əˈreɪ.ʃən/
UK /koʊˌɑp.əˈreɪ.ʃən/

1.
合作, 协作
the process of working together to achieve a common goal
:
•
International co-operation is essential for global peace.
国际合作对全球和平至关重要。
•
The project succeeded due to the excellent co-operation among team members.
由于团队成员之间的出色合作,项目取得了成功。