顺应期运；顺应时势。 汉 荀悦 《后序》：“实天生德，应运建主。
该电动装甲车靠这坦克的动力供应运转。
随着西方封建制度解体，商业阶层应运而生。
As feudalism decayed in the West it gave rise to a mercantile class.
在过去的几十年里，一种独特的卫星应运而生：立方体卫星。
Over the past few decades a unique class of satellites has been created that fits the bill: CubeSats.
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