as用做介词：常与一些动词搭配使用，如：　define ...as...,view...as...,see...as...,classify....as...

I shall define him as an individual who has elected as his primary duty and pleasure in life the activity of thingking in a Socratic way about moral problems.我们把他定义为这样的人：他们把以苏格拉底的方式来思考道德问题作为自己人生的主要责任和兴趣．

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表示否定

1)anti-(Gk)表示＂抗＂、“防”、“反”等 anti-Japanese War抗日战争，antimissile反导弹的，antifreezing liquid抗冻剂，antisocial反社会的，antimagnetic防磁的，antiseptic防腐的，防腐剂

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比较静态分析　comparative static analysis

比较优势　　comparative advantage

边际报酬递减规律　the law of diminishing marginal return

边际产量　　marginal product ,MP

边际成本　　marginal cost, MC

边际技术替代率　marginal rate of technical substitution,MRTS

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