retained correspondence

例句：

1. 1. The company has maintained a strong relationship with its suppliers for many years.
   该公司与供应商保持了多年的良好关系。
2. 2.During the negotiations, they retained their original positions and did not compromise.
   在谈判期间，他们保留了自己的立场，没有妥协。
3. 3.The two countries have maintained good relations despite the recent tensions in the region.
   尽管该地区最近的紧张局势，两国仍然保持着良好的关系。