Letter box信箱;信报箱;邮筒;供料机通道口
Dominical letter主日字母
Visa Letter签证函;签证信;出国证件函;签证信函
facility letter贷款确认书;提供贷款通知书;贷款通知
stamp letter冲字;打印字模
letter punch字母冲;钢字码;打印字母;冲字模
confirmation letter确认书;确认信;询证信函;确认信函
letter stencil字板
Motivation Letter动机信;动机信样本;留学意向书;动机函
Taoism is a native religion of China. Lu Xun once remarked in his essay A Letter to Xu Shoutang, "Taoism is the foundation of Chinese culture".
道教是中国土生土长的宗教,鲁迅先生曾在《致徐寿裳信》中指出：“中国根柢全在道教”。
参考来源 - 中国道教农业史——农业思想初探Shuyi is a popular form of ceremony and also a model on etiquette and letter style.
书仪是礼经的通俗形式，是关于典礼仪注和书札体式的范本。
参考来源 - 敦煌书仪语言研究The forth part is the emphasis of the paper, that is, Letter Word.
第四部分是全文的重点——字母词。
参考来源 - 现代汉语中的英语外来词研究N-COUNT（可数名词） If you write a letter to someone, you write a message on paper and send it to them, usually through the mail. 信 [also 'by' N]
I had received a letter from a very close friend.
我收到了一位非常亲近的朋友的来信。
N-COUNT（可数名词） Letters are written symbols which represent one of the sounds in a language. 字母
...the letters of the alphabet.
…字母表中的字母。
V-I（不及物动词） If a student letters in sports or athletics by being part of the university or college team, they are entitled to wear on their jacket the initial letter of the name of their university or college. (因体育运动出色) 赢得校名首字母徽章 [美国英语]
Burkoth lettered in American football.
伯考斯在足球赛中赢得了校名首字母徽章。
（） → see also covering letter, newsletter