exchange of notes

例句：

1. 1. The two countries havebeen exchanging ambassadors for years.
   这两个国家多年来一直在互派大使。
2. 2. They exchanged pleasantries with each other before themeeting began.
   会议开始前，他们互相问候。
3. 3. The companyis known for its high-quality products and excellent customer service.
   该公司以其高质量的产品和优秀的客户服务而闻名。