一个带有活塞的管子两端有两个气球(一大一小),为什么打开活塞后小气球里的气会流入大气球里? 知乎 Template




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tomski一个带有活塞的管子两端有两个气球(一大一小),为什么打开活塞后小气球里的气会流入大气球里? 知乎 coloring