It's the first letter I've had in ten days.

这是我十天来收到的第一封信。

《牛津词典》

We should write the first letter in capital.

把第一个字母写成大写。

youdao

It is the first letter of the English alphabet.

它是英语字母表中的第一个字母。

youdao

s2 So, I'm passing in the first character in s2, I'm making it uppercase and then I'm putting it back so casually speaking this is just capitalizing the first letter of whatever word the user typed in to s2.

那么，我把第一个字符传递给，我把它转换成大写的，然后存下来,简单说，这就是把用户输入s2中的单词,的第一个字母转换成大写的。

哈佛公开课 - 计算机科学课程节选

Why? Well, out presumably 'cause it's output, a because it's the first letter of the alphabet.

为什么？也许是因为out代表是输出吧，而a则是字母表的第一个吧。

哈佛公开课 - 计算机科学课程节选

Well, get string again is returning the address of the string the user typed in, D the address of the very first character like the letter D and storing that address in this variable s1.

好的，GetString返回的是,用户输入的字符串的地址，第一个字符的地址，比如字母,然后把这个地址存储在这个变量s1中。

哈佛公开课 - 计算机科学课程节选

It goes - I believe the first letter is E because that's the most used letter in the alphabet.

NPR: A Beautiful Movie: 'The Diving Bell and the Butterfly'

Then we got another letter critiquing the way we had shortened the first letter for our Readers Say page.

FORBES: Sidelines

The first letter made no attempt to address the tax issues, even though that was a prominent feature of the complaint.

CNN: AllPolitics - Ethics Transcript