一封公函
official───adj.官方的；正式的；公务的；n.官员；公务员；高级职员
letter───n.信；字母，文字；证书；文学，学问；字面意义；n.（Letter）（美、英、巴西）莱特（人名）；vi.写印刷体字母；vt.写字母于
ruffles official───荷叶边官员
official holiday───法定假期; 例假; 公休
elected official───当选官员
government official───[管理]政府官员
debarring official───除名官员
wechat official───微信公众号
assessing official───评估官员
She received an official letter of explanation.───她收到了一封解释性的公函。
She received an official letter of explanation .───她收到一封官方解释函。
An official letter of designation on the letter-head of a recognized media organization signed by an editor will also be accepted.───也将接受使用公认的新闻媒体组织印有抬头的信笺并经编辑签署的正式委任书。
Then, Prepaid Tuition for the semester is required before an official letter of acceptance can be issued.───然后，这学期的学费预付前必须正式的接受函。
I want my arrest expunged . Not explained by an official letter in my file, expunged . And I want a promotion. Two pay grades.───我想要我的逮捕不被一位官员解释我的文件信，而且我想要晋级。二薪级等级。
She received an official letter yesterday night.───她昨天晚上收到了一封公函。
On 11 December 1951, Wilkins wrote an official letter to Crick requesting the Cambridge team stop working on DNA.───1951年12月11日，威尔金斯给克里克写了一份公函，要求剑桥小组停止研究DNA。