求翻译：聚甲醛是高熔点、高密度、结晶性线形聚合物，具有良好的综合性能，抗拉强度、冲击韧性、刚度、疲劳强度、抗蠕变性能和尺寸稳定性都很好，吸水性小，有很好的耐化学药品能力和耐溶剂性，特别是有机溶剂和油脂。即使在高温下，聚甲醛在一般有机溶剂中的重量变化量仅为0.3%-3%，尺寸变化仅为0.1%-1%。工作温度一般为-40-140℃。缺点是加热易分解，成型比尼龙困难。是什么意思？

POM is the melting point, high density, crystalline linear polymer with good overall performance, tensile strength, impact toughness, stiffness, fatigue strength, creep resistance and dimensional stability are very good, water absorption, good chemical resistance and solvent resistance, especially o

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