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As the iPhone turns five years old today, here's a look back at WSJ columnist Walt Mossberg's reviews of each iPhone over the years. Click on the links for the full reviews: 在iPhone跨过五周岁生日之际，我们来回顾一下《华尔街日报》专栏作家莫博士(Walt Mossberg)这些年对每一款iPhone的测评。 Our verdict is that, despite some flaws and feature omissions, the iPhone is, on balance, a beautiful and breakthrough handheld computer. Its software, especially, sets a new bar for the smart-phone industry, and its clever finger-touch interface, which dispenses with a stylus and most buttons, works well, though it sometimes adds steps to common functions. 我们的结论是，尽管功能存在一些瑕疵和欠缺，但总体而言，iPhone是一款外观亮丽、技术上有突破的掌上电脑。特别是它的软件，为智能手机行业定义了新的参照系。其触摸界面灵活方便，不需要手写笔，也不需要大部分的按键，不过有时一些普通功能的操作步骤要多一些。 If you've been waiting to buy an iPhone until it dropped in price, or ran on faster cell networks, you might want to take the plunge, if you can live with the higher service costs and the weaker battery life. The same goes for those with existing iPhones who love the device but crave faster cellular data speeds. But if you already own an iPhone, and can usually use Wi-Fi for data, you probably should hold off and get the free software upgrade before deciding whether it's worth getting the new hardware. | 
