Liaison is cooperation and the exchange of information between different organizations or between different sections of an organization.
Liaison between police forces and the art world is vital to combat art crime.
警方和艺术界的合作对于打击艺术犯罪是至关重要的。
If someone acts as liaison with a particular group, or between two or more groups, their job is to encourage co-operation and the exchange of information.
He is acting as liaison with the film crew.
他担任拍摄组的联络员。
She acts as a liaison between patients and staff.
她担当病人和医务人员之间的联络员。