不能互换.rapport强调两者之间的关系,主要是人与人之间情感上的和谐融洽,而harmony则注重事物的某几个方面或不同事物之间的客观和谐,协调.如果要表达诸如"和谐社会"或"人与自然和谐"时,应用harmony,而不是rapport
给你提供一点参考资料,摘自牛津英汉双解词典:
rapport
n [U, sing] ~ (with sb/between A and B) sympathetic and harmonious relationship 融洽和谐的关系: He is in rapport with his pupils. 他与学生关系很好. * The actor developed a close rapport with his audience. 该演员与观众建立了密切的关系. * Father and son have a great rapport. 父子情深.
harmony
n 1 [U] agreement (of feelings, interests, opinions, etc) （感情、 兴趣、 意见等）相符, 一致: working towards harmony in international affairs 致力使国际事务协调一致. 2 [C, U] (instance of a) pleasing combination of related things 协调; 匀称: the harmony of colour in nature 自然界色彩的协调 * The designer's aim is to produce a harmony of shape and texture. 设计者的目标是要使外观与材料的特性两者统一起来.
3 (a) [U] (music 音) (study of the) combinationof different notes at the same time to produce chords和声（学）: The two sang in harmony. 这两人用和声演唱. (b) [C] sweet or melodious sound 美妙动听的声音;乐声. Cf 参看 concord, discord. 4 (idm 习语) in harmony (with sb/sth) agreeing; matching 协调一致; 相配: live together in perfect harmony, ie peacefully and happily 住在一起十分融洽 * His tastes are in harmony with mine. 他的爱好与我的相同.