出处：按学科分类—语言、文字 中国对外翻译出版公司《汉英成语词典》第103页（210字）
把事情看得很严肃、认真，例他郑重其事地向大家宣布喜讯，希望大家届时都能光临。
He announced the good news in an earncst voice and hoped that all would be able to attend the celebrations in due course．