Essentially, it's a larger version of the trackpads that ship with each MacBook and MacBook Pro.

本质上来说，它是一个放大版的触摸板，可与每一台macbook和macbook pro相兼容。

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At 3.7 lbs, the 13-inch X1 weighs eight ounces more than Apple’s 13-inch MacBook Air but eight ounces less than the 13-inch MacBook Pro.

一台13英寸的X1笔记本电脑重3.7磅，比相同大小的苹果MacBook Air重8盎司，但比同样大小的MacBook Pro轻8盎司。

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For example, if you want an Apple laptop, you can choose between a MacBook, a MacBook Air, and MacBook Pro.

比如说，如果你想买一个苹果笔记本，你可以挑选MacBook MacBook Air，或者MacBookPro， 仅此三种选择，没有其他的了。

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When Hertzfeld, who now works at Google, went to the Apple store, he found that Apple did indeed update the Mac Pro, though stage time at WWDC was devoted to faster new MacBook Air notebooks, updated MacBook Pro notebooks and a new high-end MacBook Pro with a high resolution Retina Display.

FORBES: Apple's Minimal Mac Pro Update Ticks Off Loyalist Andy Hertzfeld

In my estimation, this is Apple's most deliberate move yet to differentiate the 13-inch MacBook Pro from the 13-inch MacBook Air.

ENGADGET: Apple 13-inch Retina MacBook Pro hands-on! Hands-on

Intel processors can also be found in the MacBook Air, as well as the next-gen MacBook Pro, which has blown away sales expectations.

FORBES: Did Apple or the Economy Cause the PC Sales Slump?