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Why Salt Melts Ice on Roads
为什么盐能融化路面结冰
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Salt lowers the freezing point of water below zero degrees.盐能降低水的冰点，使其低于零度。
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Pure water freezes at 0°C, but saltwater freezes colder.纯水在0°C结冰，而盐水则在更低温度下结冰。
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When salt spreads on ice, it forms brine that stays liquid.盐撒在冰上会形成不易结冰的卤水。
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This breaks the bond between ice crystals slowly.这会缓慢破坏冰晶之间的结合力。
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Less ice means safer roads for cars and walkers.结冰减少，道路对车辆和行人更安全。
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Too much salt can harm plants and metal bridges though.但过量用盐会伤害植物和金属桥梁。
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Cities use just enough salt for safety and care.城市仅使用适量盐，兼顾安全与环保。
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This simple chemistry helps us travel safely in winter.这一简单化学原理，助我们冬日出行更安全。