the act of working together with someone or doing what they ask you

This documentary was made with the cooperation of the victims' families. 该纪录片系与受害者家庭合作拍摄。

There's very little cooperation between the two countries. 两国间少有合作。

The company produces computers in cooperation with a German firm. 该公司与德国一家公司合作生产计算机。