六级

前言
Unit One National economical administration and household economy
Unit Two The evolution of intelligence among the herbivores
Unit Three Hot-spot activity
Unit Four Edward and the duchess of windsor
Unit Five Children's language acquisition
Unit Six Hydrothemal vents
Unit Seven Food advertisements
Unit Eight San francisco needs more reforms
Unit nine The language varies as time goes on
Unit Ten Low-cost materials with high efficiencies
Notes from unit 1to10
Unit Eleven Shrinking water supply poses threat to peace
Unit Twelve The rescue of a midget submarine
Unit Thirteen Before the web-Dots and dashes
Unit Fourteen A view of the supreme being
Unit Fifteen Economic efficiency in hospital
Unit Sixteen Intoxication and vehicle accidents
Unit Seventeen English royal college of music
Unit Eighteen Toward a definition of science fiction
Unit Nineteen Britain and world war II
Unit Twenty The tibeten upland
Notes from unit 11to20
Unit Twenty-one Em pirical equations
Unit Twenty-two The pelican
Unit Twenty-three Is harvard worth it?
Unit Twenty-four Communication territoriality
Unit Twenty-five The verbal impact upon the witnesses
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参考译文