同时，第六代iPod nano相比前代型号少了一些功能。
At the same time, the 6g iPod nano is missing quite a few features compared to previous models.
他的公司将提供酶和生产完全替代型燃料所需要的基因工程菌。
He will provide the enzymes and genetically engineered bacteria needed to make a drop-in fuel.
通用汽车公司上个月公开发布了电动汽车Volt，这家公司也在寻求替代型发动机。
General motors Co., which launched its Volt electric car last month, also is looking into alternative types of motors.
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