The machine uses a technology that automatically adjusts the speed and tone of any song being played to match the tempo and key the singer is using.

这台机器使用了一种技术，可以自动调整任何正在播放的歌曲的速度和音调，以配合歌手所使用的节奏和音调。

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The bulk of the data is encrypted using a symmetric key algorithm that encrypts and decrypts data using a single secure key.

数据块使用一个对称密钥算法进行加密，它使用一个密钥来实现对数据的加密和解密。

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You need to make sure people are using it and that the key stores are secure.

您需要确保人们准备使用它，并且关键的存储是安全的。

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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

Using the spare key that he carried, he unlocked the front door and entered the house.

NEWYORKER: The Autobiography of J.G.B.

But for the average person using web search engines, there's a really easy one that a lot of people still don't do, although the search engines have made their technologies smarter, and that's using quotations marks around two or more key words that you want to search as a phrase.

NPR: Tips for Easing Internet Information Overload

The D-Pad can be flipped to the opposite side of the controller using the small mode key so that lefties can join in the fun, too.

ENGADGET: Black Powder Media's Impulse Controller hands-on (video)