The polyolefin foamed plastics have the characteristics of good tensile strength, stiffness and hardness, etc, which lead to its extensive application in automobile.
聚烯烃泡沫塑料具有较好的拉伸强度、刚度及硬度等特点，在汽车上得到广泛的应用。
Some of the useful properties of ceramics and glasses include high melting temperature, low density, high strength, stiffness, hardness, wear resistance, and corrosion resistance.
高熔点、低密度、高强度、高刚性、高硬度、高耐磨性和抗腐蚀性是陶瓷和玻璃的一些有用特性。
Laotse said that "Therefore hardness and stiffness are the companions of death, and softness and gentleness are the companions of life", which is opposite to our common sense.
老子说，坚强者，死之徒，柔弱者，生之徒。这一点与我们一般的常识相较是大相径庭的。
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