Goodyear spent another four years, in which things went very badly with him, before he made the discovery how to vulcanize rubber completely.
固特异又化了四年的时间，在这四年中，霉运一直跟着它，直到发现如何使橡胶完全硫化的方法。
Goodyear spent another four years, in which things went very badly with him, before he made the discovery how to vulcanize rubber completely.
固特异又化了四年的时间，在这四年中，霉运一直跟着它，直到发现如何使橡胶完全硫化的方法。
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