求翻译：目前在美国，对置活塞发动机已经成为提升汽车传统动力一个技术突破口。去年，美国的AchatesPower和EcoMotors先后来中国介绍了其对置活塞二冲程发动机，它们主要是基于汽车发动机材料及制造设备的进步，尤其是计算机技术的突破，将二战后被淘汰的对置活塞二冲程飞机发动机“复活”为高效率的汽车发动机。与性能相同的四冲程发动机相比，对置活塞二冲程发动机的重量降低了34%，成本降低了12%；燃油效率大幅提高，而排放能够满足世界上最严格的美国EPA10和欧6标准。是什么意思？

In the U.S., opposed piston engines has become a technological breakthrough point to enhance the car the traditional power. Last year, the United States achatespower and ecomotors has come to China and its opposed piston two-stroke engine, they are mainly based on the progress of the automotive engi

Currently in the United States, built-in piston engine has become a traditional power lift car a technical breakthrough. Last year, the United States and the AchatesPower EcoMotors successively introduced to China for its built-in 2-stroke piston engine, which is mainly based on automotive engine ma