Aurora生物燃料公司的魏斯曼自从上个世纪70年代的石油危机以来一直在研究种植海藻作为燃油的可能性。
Joseph Weissman of Aurora Biofuels has been researching the potential of growing algae as a potential source of fuel oil since the oil crisis of the late 1970s.
自从上个世纪40年代孤独症开始为人所知以来，一个普遍接受的观念就是男性患者大大多于女性患者。
Ever since autism was first identified in the 1940s it has been accepted that autistic males heavily outnumber females.
自从上个世纪70年代以来，全球日益严重的环境问题越来越受到人们的重视。
The global increasingly severe environmental problems have got people's attention more and more since the 70's of last century.
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