You are a professor in the field of building fires in civil engineering please help me polish the following text to make it suitable for publication on SCI journalsThe large temperature difference bet

“The study investigated the thermal strain coordination of building roofs under fire conditions. The results indicated a significant temperature difference between the inner and outer surfaces of the ceiling, suggesting a challenge in coordinating the thermal strain inside the roof. Specifically, the inner surface exhibited high temperature and large thermal strain, while the outer surface had low temperature and small thermal strain. The outer surface imposed a limitation on the thermal expansion of the inner surface, resulting in compression of the inner surface and pulling of the outer surface. At a certain temperature difference, the tensile stress of the outer surface reached the ultimate tensile strength of the concrete, leading to cracks. The mechanism of concrete cracking due to uncoordinated thermal strain is illustrated in Fig. 10. These findings provide insights into the behavior of building roofs under fire conditions, which can inform the design and construction of fire-resistant buildings.