a cleaner more efficient engine
更清洁、更高效的发动机
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Schwarzenegger, who has taken to helping market cars that run on cleaner and more fuel efficient technology, had just finished inspecting a Volkswagen Passat with a hydrogen-powered engine.
施瓦辛格现在已置身于更环保和低油耗和汽车的推广之中，他刚刚完成了对大众PASSAT氢动力引擎的视察。
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It is a cleaner, more fuel-efficient engine than the gas-guzzling original, which the carmaker stopped producing in 1971.
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