Plug-in hybrids are back in the spotlight, but lurking in the shadows is the same old problem: building a lightweight, powerful, affordable battery. WHEN GENERAL MOTORS unveiled the Chevy Volt in January, plug-in hybrids suddenly seemed to matter again. Sure, the Volt is a concept car, and more of a testbed for various electric-drive systems than a showcase for plug-in charging (see our Detroit show coverage on page 37). And the aftermarket kits that turn a Toyota Prius into a plug-in have been around for years. But with GM planning to build two plug-in vehicles - the Volt, as well as its next Saturn Vue Green Line - this technology is looking like the biggest thing since, well, hybrids.
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机译：插电式混合动力车再次成为人们关注的焦点，但潜伏在阴影中的是同样的老问题：制造轻巧，功能强大且价格适中的电池。当通用汽车在一月份发布雪佛兰Volt时，插电式混合动力车似乎突然又变得重要了。当然，Volt是概念车，它不仅是用于充电的展示柜，更是用于各种电动系统的测试台（请参阅第37页，底特律车展报道）。将丰田普锐斯变成插件的售后套件已经存在了很多年。但是，由于通用汽车计划制造两款插电式汽车-沃尔特（Volt），以及其下一款土星Vue Green Line-这种技术看起来是混合动力以来最大的事情。
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