正如十九世纪充气轮胎的发明使得橡胶变成宝贵的商品，世界在二十一世纪趋向环保能源的风潮预计将同样会使锂成为炙手可热的商品。
As the invention of the pneumatic tyre turned rubber into a precious commodity in the 19th century, the world's tilt towards greener energy is expected to do the same for lithium in the 21st.
非常酷的一点：轮胎由结实的橡胶环刻而成(当时的轮胎都不充气的)，这是唯一能支撑车重的方法。
One cool bit: the tires were chiseled from solid blocks of rubber, the only way to support the weight of the car.
新的充气橡胶轮胎。
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