按照Green500的最新超级计算机排行榜，IBM生产的计算机性能最强、能效最高。
IBM produces the most powerful and energy efficient computers on the planet, according to the latest supercomputing Green500 list.
丰田公司夸耀称，该汽车的性能相当于一辆12缸汽车，而这归功于其最强大的V8发动机，与一个混合动力系统的结合。
Toyota boasts that the car's performance is on a par with a 12-cylinder vehicle, thanks to a combination of its most powerful V8 engine and a hybrid system.
更正：本文起初对甲烷的性能掌握有误——其温室效应是二氧化碳的21倍之多，是最强的温室气体。
Correction: the article originally misstated that methane, at least 21 times more potent than CO2, is the most potent of greenhouse gases.
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