tranquillity英美网络 安宁; 宁静; 平静; 心神稳定; 静海石BNC.11326 / COCA.19627英英释义nouna disposition free from stress or emotionSynonym:reposequietplacidityserenitytranquilitya state of peace and quietSynonym:tranquilityquietnessquietudean untroubled stateSynonym:tranquilityquiet双语例句