The next round in the smartphone battle between Apple and Google is under way, with the iPhone 4 on sale today and a next generation of Android-based phones being unveiled.
苹果(Apple)与谷歌(Google)之间的下一轮智能手机较量已经展开，今日苹果iPhone 4开始销售，而采用谷歌Android操作系统的下一代手机也将亮相。
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