一个人如何选择无车的生活使他的邻居，他的社交圈，和他自己带来更多的火花。
How one man's choice to live car-free brought him more in touch with his neighbors, his community, and himself.
柴油机因其马虎粗糙的无火花塞点火方法，而素有烟雾弥漫和刺鼻难闻的恶名。
DIESEL engines, with their rough-and-ready, spark-plug-free method of fuel ignition, have a reputation for being smoky and smelly.
作为多旋翼微直升机的驱动器，微型无刷直流电动机具有结构简单、制造方便、无换向火花等特点。
As the driver of the micro multi-rotor craft, the micro BLDC motor was of simple structure, easy fabrication, non commutation spark and so on.
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