open letter

1. N-COUNT An open letter is a letter that is published in a newspaper or magazine. It is addressed to a particular person but is intended for the general reader, usually in order to protest or give an opinion about something. 公开信; 发表于报刊或杂志上、署名写给某人但实际是面向大众的信，通常旨在抗议或评论某事

The Lithuanian parliament also sent an open letter to the United Nations. 立陶宛议会也向联合国递交了一封公开信。