The reason Google offers Android for free is because it helps grow Google's wide moat around digital advertising.

谷歌提供免费安卓是为了帮助自己进一步拓展在数字广告领域的影响力。

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The Android app is really important, since ArsTechnica rightly observes: "the success of Google + will partly depend on the quality of the user experience the service offers on mobile devices."

Android的应用可谓非常重要，如同ArsTechnica所描述的：google +的成功将部分归功于移动客户端的应用体验。

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Part of the appeal of Android has been that Google offers it free, but Wednesday's pact attaches a cost to Android, at least for Samsung.

安卓操作系统的一部分吸引力在于它是谷歌免费提供的，但周三签署的这项协议让使用安卓系统有了成本，至少对三星电子而言是这样。

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Because Google offers Android for free, including the source code, it makes Google look like a saint, or a company of higher moral standard than Apple or Microsoft.

FORBES: Microsoft Gives User Data To The U.S. Government Less Often Than Google, But To Foreign Governments Far More

Distimo released a report claiming Google's Android Market offers more free applications than Apple's App Store.

FORBES: The Forbes Post

While Apple's tightly controlled ecosystem offers little room for customization, Google's Android software is far more malleable, providing latitude for Facebook and handset makers to shape the user experience.

WSJ: Facebook to Land on Phone's Home Screen