Its value can be a number or letter and should be unique among all the elements.

它的值可以是数字或字母，且在所有元素中应保持惟一。

youdao

The short form string should include each valid option letter, followed by a colon (:) to indicate that the command line option should be followed by a value.

短形式字符串应该包含每个有效的选项字母，每个字母后面是一个冒号 (:)，这表示命令行选项后面应该是一个值。

youdao

Make a second copy of the array, shuffle the copy, and build an associative array, where the original letter gets a shuffled value.

制作另外一份数组副本，搅乱该副本，并构建一个联合数组，其中原来的字母将获得重组后的值。

youdao

So it does that for us so that you can get away with just knowing the address of the first byte and it will make sure that you know when to stop by including the special value so, in fact, get the string if you type in a three-letter word, we allocate four bytes no matter what because we need an additional byte 0 for this special sentinel value back slash zero at the very end.

它为我们做了这些事情，这样我们就可以,通过第一个字节的地址,它还可以通过包含一个特殊的值,来保证在哪里停止，如果你输入了一个三个字母的单词,就可以获得那个字符串，不管怎样，我们分配四个字节,因为我们在末端需要一个额外的字节,来保存这个特殊的标志值--反斜杠。

哈佛公开课 - 计算机科学课程节选

Each letter is also given a point value based on difficulty, and some even award extra points by doubling or tripling the letter or overall word score.

CNN: Apparently This Matters: Ruzzle

Other member of the subcommittee and I appreciated this point, but believed that the first letter was of limited or little value.

CNN: AllPolitics - Ethics Transcript

In the old days taxpayers would often attach to their return a simple, bare-bones letter from an accountant stating the gift's value.

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