1、说话彬彬有礼
... hold one's tongue 住嘴; 不开口 keep a civil tongue 说话彬彬有礼 keep a still tongue in one's head 守口如瓶 ...
2、措词谨慎
keep a civil tongue 措词谨慎，说话文雅，说话彬彬有礼with one’s tongue in one’s cheek 假心假意地；(说话)无诚意地；言不由衷地 .
3、说文明话
... civil society 文明社会 keep a civil tongue 说文明话 a civil code 民法典 ...