一架着陆的飞机、一个正在烘烤之中的糕点、一座冷却塔和一杯加糖的茶，它们都有什么共同点？它们全都包含有动量、热量和质量传递。
What do a landing plane, a baking cake, a cooling tower and sweetened tea have in common? They all involve a transfer of momentum, heat or mass.
一架着陆的飞机、一个正在烘烤之中的糕点、一座冷却塔和一杯加糖的茶，它们都有什么共同点？它们全都包含有动量、热量和质量传递。
What do a landing plane, a baking cake, a cooling tower and sweetened tea have in common? They all involve a transfer of momentum, heat or mass.
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