专家预测，高污染、低效率的内燃机，在五十年内会被比较环保的能源转换器取代。
Experts predict that the highly polluting, grossly inefficient internal combustion engine will be superseded by a more environmentally friendly energy converter within 50 years.
虽然在概念它执行一个“简单”的能源转换器的功能，在实践中有这个基本的无源元件相关的许多问题。
Although in concept it performs a "simple" energy-transducer function, in practice there are many issues associated with this basic passive component.
RailPower 技术公司的“绿色山羊”——使用了柴油和电力两种能源的转换器（小型，短距离火车头），以此来在铁轨上组装，拆卸并且移动火车车厢。 这种转换器自2001年研制成功以来，就成为了铁路产业的第一个简易的混合能源装置。
RailPower Technologies Corp.'s Green Goat—a diesel-electric "switcher" (small, short-distance locomotive) used for assembling, disassembling and moving train cars in rai...[More]
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