translation.en: This engine, because it was so interesting -- it only worked on air, no steam -- has led to hundreds of creative designs over the years that use the Stirling engine principle.
translation.zh: 这种引擎只能用空气驱动，而不是用蒸汽， 由于这一有趣的特性，多年来衍生了很多创造性的设计 基于斯特灵机原理。