In a real application, you might not add such buttons if you want to keep the user interface simple and do both saving and restoring transparently and automatically.
在真实的应用程序中，如果希望保持用户界面简洁并能够透明、自动地保存和恢复表单，则不需要添加这些按钮。
That was a house to look at; and there lived an old man, who wore plush breeches; and he had a coat with large brass buttons, and a wig that one could see was a real wig.
那里面住着一个老人。他穿着一条天鹅绒的马裤，一件有大黄铜扣子的上衣；他还戴着一副假发①——人们一眼就可以看出这是真正的假发。
Traditional user interfaces are evolving from crude rectangular Windows with buttons and menus to full-fledged real-world virtual "gadgets."
传统的用户界面正从有着按钮和菜单的粗糙矩形窗口向成熟的虚拟现实世界的“精美的小器件”演化。
In some ways, these are actually better than the soft buttons located in iPhone apps, because they're always in the same place. It also saves some screen real estate.
在一些方面，这确实比iphone软件里的虚拟按键好，因为它们的位置是固定的，同时还为屏幕省出来更多地方。
Sure, your friend can't sing on key and the bass buttons sticks, but the real problem, it seems, is your drums - terribly off-beat, and out of sync with the rest of the band.
“结束出局下台吧您呐”。当然当然，你的朋友没唱准，而且贝司的按键有些粘滞，不过真正的问题…似乎…是你的鼓打得太糟糕了，一点儿都不在鼓点上，和整个乐队不同步。
And that's why we use things like menus, checkouts, shopping baskets, buttons, folders, arrows - digital representations of real-life objects that help us understand the virtual world in front of us.
这就是为什么我们使用菜单一样的东西，结帐，购物篮，按钮，文件夹，箭头-现实生活的对象，帮助我们了解在我们面前的虚拟世界的数字表示。
Its real-time speed values are directly displayed by LED, and instantaneous speed values are also displayed by the push-buttons and prior setting speed values.
它的实时转速值通过L ED显示非常方便直观，还可以通过按键显示瞬时转速值，事先设定的转速值。
Its real-time speed values are directly displayed by LED, and instantaneous speed values are also displayed by the push-buttons and prior setting speed values.
它的实时转速值通过L ED显示非常方便直观，还可以通过按键显示瞬时转速值，事先设定的转速值。
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