Wood also has low thermal conductivity, making it easier to heat and cool buildings with less energy waste.

木材还具有低导热性，使其更容易为建筑物供暖和制冷，减少能源浪费。

Its superior heat conductivity is also noteworthy, with graphene's thermal conductivity being much higher than that of any other known material.

其卓越的导热性也值得注意，石墨烯的导热性远高于任何其他已知材料。

The higher the value for k is, the higher the thermal conductivity of the material, and the faster heat flows.

用字母k，k值越大，系数越大 物料热传导，流速增加。