An alphabet is an ordered system of symbols called letters.

字母表是一种由叫做字母的符号组成的规则的系统。

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These letters were made into a collection of short videos called "A Letter to Friends".

这些信件被制成短片集，名为“写给朋友的信”。

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Pretty darn warm and genuine, is how Andy, as White's friends called him, comes off in these letters. And danged peculiar.

这些信中的那个“安迪”——也就是朋友们对怀特的称呼——既亲切，又真挚，又与众不同。

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For example, one program is called "Letters for Literature."

VOA: special.2009.10.12

those family letters have been published in a book called The Children of Pride, and a brilliant book has been written about Colcott Jones and his extended family by Erskine Clarke called Dwelling Place.

这些家书后来被公布于世,收录在一本名叫《骄傲的孩子》的书中,另外有一本书是关于,考克特.琼斯和他的远亲家的故事,厄斯金克拉克

耶鲁公开课 - 美国内战与重建课程节选

Erlandson has just published a book called Letters to Kurt, which is based on his relationship with the star.

BBC: Kurt Cobain 'produced solo work' says Hole musician

Well, any biotechnology investor would, because the standard practice in the biotech industry is not to reveal the rejection letters, called Complete Response Letters, in which the Food and Drug Administration spells out why it is not approving a drug and what questions it needs answered before it will reconsider.

FORBES: MannKind Becomes Poster Child For Dangers Of FDA Secrecy

The children get so-called Crummey letters (named after a court case), which give them a small window of time within which they can withdraw the money.

FORBES: Hoist By Your Own Petard