mutual 着重彼此共有或共享，局限于双方的关系。
common 侧重两人或多人共有共同，但不暗示彼此间存在的等价关系。
joint 强调至少两人或两方共同占用，侧重指一个统一体。
reciprocal 着重互惠，有来有往。
参考例句
1. Although I gave him many presents, I had no reciprocal gifts from him. 虽然我给他很多礼物，但我没有收到过他给我的礼物。
2. The vocation advocate found the word "vocal" and "reciprocal" not in the vocabulary. 职业倡导者发现”嗓音的”和”交互的”两词不在词汇表中。
3. The paper says authorities hae "a strong reciprocal obligation" to support isolated patients with humane and decent living conditions. 这篇文章说当局有一个强有力的互惠义务来支持隔离病人的***和适宜的居住条件。
英英解释
n.
1. something (a term or expression or concept) that has a reciprocal relation to something else
2. (mathematics) one of a pair of numbers whose product is 1: the reciprocal of 2/3 is 3/2; the multipl
3. hybridization involving a pair of crosses that reverse the sexes associated with each genotype adj.
1. concerning each of two or more persons or things; especially given or done in return
2. of or relating to the multiplicative inverse of a quantity or function
