十年前，北美的大多数乙烯是石油脑(一种石油衍生物)所制：其生产过程所产生的副产物正是丙烯。
A decade ago most ethylene in North America was made using naphtha, an oil derivative: it is this process that has propylene as its by-product.
面对外国石油公司的头头脑脑，他曾经说过一句历久不衰的狠话，“人类没石油都活了5000年，为了争取合法权利，再多过几年没石油的日子，自然也不成问题”。
He memorably challenged foreign oil executives by telling them "people who have lived without oil for 5,000 years can live without it again for a few years in order to attain their legitimate rights".
面对外国石油公司的头头脑脑，他曾经说过一句历久不衰的狠话，“人类没石油都活了5000年，为了争取合法权利，再多过几年没石油的日子，自然也不成问题”。
He memorably challenged foreign oil executives by telling them "people who have lived without oil for 5,000 years can live without it again for a few years in order to attain their legitimate rights".
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