礼尚往来的英文：
[Literal Meaning]
courtesy/demand/reciprocity
Courtesy demands reciprocity.
[解释]
礼节注重互相往来。
[Explanation]
Courtesy demands reciprocity.
[例子]
在两个国家交往的过程中，它们彼此礼尚往来，互相尊重，建立了深厚的友谊。
[Example]
In the process of diplomacy, the two countries exchange favors and established deep friendship with mutual respect.
- Courtesy on one side cannot last long
礼尚往来 - ①Courtesy demands reciprocity．②Courtesy on one side only lasts not long．
礼尚往来 - Courtesy requires reciprocity among neighbors.
乡里之间讲究礼尚往来。 - "Propriety suggests reciprocity. It is not propriety not to give But to receive, or vice versa"
礼尚往来,往而不来,非礼也;来而不往,亦非礼也