We need those letters. - What letters?

我们要那些信什么信？

youdao

I leave it up to your physics teachers to decide what letters to use for all these things.

这个留给你们物理老师来讲，这些字母怎么用。

youdao

It will just tell us what letters any particular cell likes to connect to, and it will of course tell us the letter of this particular cell (which can also be a blank tile).

它只是要告诉我们任意一个特定细胞可能会连接到哪些字母，当然，它也会告诉我们这个特定细胞的字母(也可能是一个空块)。

youdao

It suggested that students "Write letters to themselves about what they can do to help the president."

VOA: special.2009.09.10

The actual fluctuation of your voice isn't something that's taught, but what they teach you is how to pronounce the letters properly, and rules that go along with the letters.

你声音的起伏不是别人教的,但是他们教会你的是,字母的正确发音，以及这些诵读这些字母的规则。

普林斯顿公开课 - 人性课程节选

But we know already from week zero that computers ultimately represent all information with numbers, and if they want to represent letters inside memory, well what do they do or what do they use?

但是自从上周我们已经知道,计算机最终是用数字来表示所有的,信息，如果它们要描绘,在内存中的字母，它们该怎么做，用什么方式呢？

哈佛公开课 - 计算机科学课程节选

The mayor, Bob Scott, a lifelong resident, told me that he wants the world to know that Sioux City doesn't do what those three letters on the baggage tags says.

CNN: Sioux City SUX, and that's OK

In creating the recipes for their new book, Greta says she learned from readers' letters what types of dishes people make most often and what types of ingredients they like to use.

CNN: Word of mouth

They write "dear birth mother" letters about what good mothers and fathers they would be.

CNN: Adoption goes on-line