Too complex for complete analysis Separation into non-interacting subsystems distorts the results The most important properties are emergent Too organized for statistics Too much underlying structure that distorts the statistics Organized Complexity\(Weinberg) Copyright Nancy Leveson, Sept 1999

1. You still have a lot _if you'll forgive my A)to learn/saying B) learning/saying C) learningto say D) to learn/to say 2. There is no point to persuade him to do anything A)to try B)in trying C)of trying

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1空气污染连续自动监测系统 2水污染连续自动监测系统 3遥感监测技术 4简易监测方法

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1. Be careful while crossing the street. to knock to be knocked C being knocked to have knocked