The cool exterior.The fire below.
外表冷淡，内心热情似火。
You then cover it with a heavy top and light a fire below.
然后我们盖上厚重的锅盖，点上火。
It is necessary to cool combustible materials below their ignition temperatures to stop the fire.
必须通过把可燃材料冷却到它们的点燃温度以下来灭火。
It is necessary to cool combustible materials below their ignition temperatures to stop the fire.
必须通过把可燃材料冷却到它们的点燃温度以下来灭火。
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