), the heat resistance of materials is a factor that must be borne in mind, and so is the cost of energy.
), the heat resistance of materials is a factor that must be borne in mind, and so is the cost of energy.
)，材料的耐热性也是必须牢记在心的一个因素，还有能量的费用。
), the heat resistance of materials is a factor that must be borne in mind, and so is the cost of energy.
)，材料的耐热性也是必须牢记在心的一个因素，还有能量的费用。