As an example of the use of a key number, consider.

以键编号的用法为例，请考虑。

youdao

The associated data is simple: a string "Hello World" appended with the key number.

关联的数据非常简单：字符串“Hello World”附带有该键号。

youdao

Its keyboard includes a 10-key number set on the right, like that found on most desktop keyboards.

其键盘右侧有与大多数台式机键盘类似的、10个单独的数字键。

youdao

"Our alliance with Japan is key to a number of important regional and even global issues,"

VOA: standard.2009.08.31

If you have some plain text, some message that you want to send, well, you can encrypt it or you can scramble it using a key, a secret key, which might be a physical machine like the Enigma 13 or it might be a number like 13.

如果你有没有加密的文本，你想要寄送的一些消息,你就可以加密它,或者你可以用一个密钥使其变得混乱，那就像一个英格玛的物理装置,或者他就是一个数字。

哈佛公开课 - 计算机科学课程节选

The number that you choose to rotate your letters by is what we call in cryptography, a key.

你选择的旋转字母的数量,就是所谓的加密学，一个密钥。

哈佛公开课 - 计算机科学课程节选

Another key number is the incubation period--how long it takes one person to become sick after being infected.

FORBES: Bird Watchers

The key number here is another month, 21st month in a row, of private sector job growth -- 140, 000 I think this month.

WHITEHOUSE: Press Briefing

The other key number: 9%.

FORBES: *Updated below.