The lower stalks of the steering wheel have two extra buttons.

方向盘下面有两个额外的按钮。

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Now we have two buttons that grow in ratios of 2:3 and 1:3 of extra horizontal space.

现在我们有两个按钮，两者之间的大小比例为2：3，额外水平空间比例为1：3。

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Their input capabilities are limited to a few buttons or numbers, or entering data takes extra time, as happens with a personal digital assistant's (PDA) handwriting-recognition capabilities.

它们的输入功能局限于几个按键或数字键，或者像个人数字助理（PDA）手写体识别功能那样，输入数据要花很长时间，它们所拥有的工作处理能力和内存都较小。

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Capellas said one possible device for such continuous computing would be similar to today's mobile phone with extra buttons for nontelephony functionality.

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Dubbed the Pianocade, it's a synthesizer and MIDI controller that, as you can see, is disguised as an arcade authentic joystick (albeit one with quite a few extra buttons).

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All the functions are extremely easy to use thanks to extra-large buttons and extra-large letters.

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