Choose a heart of a certain color so that there was at least one heart of the same color near it.
选择一个心脏有一定的颜色，使至少有一个核心，相同的颜色靠近它。
In the past some people thought that heat was a fluid, because it can flow from a hot body to a cooler one until both are at the same temperature.
在过去，一些人认为热是流体，因为它能。一个热的物体流到一个较冷的物体，一直到这两个物体温度相同为止。
In the past some people thought that heat was a fluid, because it can flow from a hot body to a cooler one until both are at the same temperature.
在过去，一些人认为热是流体，因为它能。一个热的物体流到一个较冷的物体，一直到这两个物体温度相同为止。
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