根据《柯林斯英汉双解大词典 》：
ADJ A reciprocal action or agreement involves two people or groups who do the same thing to each other or agree to help each another in a similar way. 相互的; 互惠的 [正式][1]
reciprocal relation 互反关系
reciprocal transformation 相互转化；反向变换；倒数转换
reciprocal relationship 互反关系
reciprocal cross 正反交；互交
reciprocal action 互相酌；相互酌；交互作用[1]
They expected a reciprocal gesture before more hostages could be freed.
他们期望在更多的人质被释放之前有互惠的表示。
The two colleges have a reciprocal arrangement whereby students from one college can attend classes at the other.
两所学院有一项互惠协定，允许学生在院际间选课。
The result indicates that there are reciprocal connections between the parabrachial nucleus and caudal portion of the dorsal vagal complex.
结果说明臂旁核和迷走神经背核簇尾侧部之间有交互联系。[1]
Reciprocal or regressive?