Male dolphins form lifelong cooperative relationships.

雄性海豚会形成终生的合作关系。

America does not perceive there to be a zero-sum game taking place; the United States and NATO remain committed to seeking a constructive, cooperative relationship with Russia.

美国不认为那里会上演一场零和博弈;美国和北约将继续致力于寻求与俄罗斯的建设及协作性关系。