For four decades, Mr. Knight, who is now 69 years old, built the Beaverton, Ore., company into the industry titan while maintaining a personal reputation for seclusion and secrecy.
现年69岁的奈特在过去40多年中把这家位于俄勒冈州比弗顿的公司打造成了行业巨头，而他本人则以低调和隐秘闻名。
During many decades study, scientists have produced different types of bio-fuels that into four types: first generation, second generation, third generation and fourth generation.
通过几十年的研究，科学家们生产出的不同生物燃料分为四类：第一代，第二代，第三代和第四代。
During many decades study, scientists have produced different types of bio-fuels that into four types: first generation, second generation, third generation and fourth generation.
通过几十年的研究，科学家们生产出的不同生物燃料分为四类：第一代，第二代，第三代和第四代。
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