Third, there wont necessarily be any cost savings when you consider how expensive it is to manufacture the fuel-cell engine. Thats because fuel-cell engines require components made of platinum, a very rare and expensive metal. Without the platinum components in the engine, the hydrogen doesnt undergo the chemical reaction that produces the electricity to power the automobile. All the efforts to replace platinum with a cheaper material have so far been unsuccessful.
第三,当你知道制造燃料电池发动机有多贵的时候,你就不会认为使用它省钱了。价格昂贵是因为燃料电池发动机的原件是铂金的,而铂金是一种非常稀有而昂贵的金属。如果发动机不用铂金制造的话,氢就不能进行可以生产电能的化学反应,也就不能为汽车提供能量了。所有关于寻找成本低廉的铂金替代品的研究都还没有取得成功。
听力笔记内容:
Main point: not the solution
Sub point one: not as easily available, pure liquid state, minus 253 degrees
Sub point two: not solve, creates a lot of pollution, factories, hydrogen, pollute
Sub point three: wont, platinum, doesnt undergo, unsuccessful
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