Polyurethane has outstanding oil and fuel resistance, and is generally resistant to moderate chemicals, fats, diluted acids, and many hydrocarbons.

聚氨酯在石油和燃料应用上也表现优异，通常适用于中度腐蚀性化学物质、油脂、稀释酸，以及许多碳氢化合物。

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Tyre designers have therefore sought to improve fuel economy by reducing rolling resistance.

轮胎设计者因此力求减少滚动阻力以提高能源利用的经济性。

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The performance advantages of both fluorine rubber and silicone rubber, oil resistance, solvent resistance, fuel oil and high and low temperature resistance are good.

其性能兼有氟素橡胶及硅橡胶的优点，耐油、耐溶剂、耐燃料油及耐高低温性均佳。

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Pakistan has felt let down by America's failure to back it in its wars against India, and abandoned when, after helping Pakistan fuel the anti-Soviet resistance in Afghanistan in the 1980s, America turned its attention elsewhere.

ECONOMIST: Banyan

They are more aerodynamic and have low-rolling-resistance tires to boost fuel efficiency.

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And the difference between a machine-made hull and one shaped by Saito is significant: with the right curve, a boat will glide through the sea with less resistance and burn less fuel.

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