Only US firefighters and repairmen can use the buttons to speed up the door-closing process if they have a code or special keys.

只有美国消防员和维修人员有密码或者特殊的钥匙时，他们才能按按钮加速关门的过程。

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A few special keys are used in NLTK, different ones by the various subpackages.

在NLTK中使用了一些专门的键，不同的键由不同的子程序包所使用。

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Another prevention method was through elaborate locking rings which made meters non-removable, except with special keys.

另一个预防措施就是安装精制的锁环，使仪表非得用特备的钥匙才能移动。

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Keys are just targets at special locations.

键盘代表处于特定位置的目标点。

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Both vehicles were manufactured with special keys that include a chip to prevent thieves from starting the vehicle without the key.

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The Tactile Pro 4 closely matches the layout of a standard Mac keyboard - complete with an Fn key and special function keys that work just like those on an actual Apple keyboard.

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It hasn't been just new projects that are making headlines: In November, even the Empire State Building got a makeover, when the owners installed a new LED light system whose millions of colors can ripple, cross-fade, strobe and burst in time to the tunes of Alicia Keys or a special New Year's show.

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