There is no one-to-one correspondence between sounds and letters.

发音与字母之间没有一对一的关系。

《牛津词典》

In African languages there is a close correspondence between sounds and letters.

在非洲各语言中，语音和字母之间有着密切的对应关系。

《柯林斯英汉双解大词典》

Memorandums and letters differ somewhat in appearance.

备忘录和信件在外观上有些不同。

youdao

In nineteen thirty, the American National Institute of Arts and Letters gave Wharton a gold medal.

VOA: special.2010.10.24

Diets by numbers and letters -eDiets, Number Seven, The GI Diet.

还有关于数字和字母的减肥法,E减肥法,数字七,GI减肥法

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

So, his letters come out of this western land, New Mexico, and a land of criminality, the reform school.

他的信从新墨西哥这片西部的土地而来，还是寄宿学校这种犯罪滋生地。

耶鲁公开课 - 1945年后的美国小说课程节选

Can you clarify -- is that three facilities and letters total, or just two?

WHITEHOUSE: Press Briefing

Please know how important your calls, visits and letters are to the maintenance of our liberties.

CNN: Transcript: Bachmann's response to State of the Union

The college's Angus Library contains over 70, 000 books, pamphlets, journals, church records and letters.

BBC: University of Oxford awarded ?500,000 for Angus Library