科技英语教程 下PDF电子书下载

Lesson One Eating Disorders 1

Lesson Two New Scientific Breakthroughs 9

Lesson Three The Popular Science 17

Lesson Four Improving Gene Transfer in Livestock 28

Lesson Five Electrical and Electronic Engineering in the Future 36

Lesson Six Fuel for thought 44

Lesson Seven Deep Chill Triggers Record Ozone Hole 53

Lesson Eight Sea Otter Declines Blamed on Hungry Killers 60

Lesson Nine The Science that Imitates Nature’s Mechanisms 71

Lesson Ten Information Handling Systems 82

Lesson Eleven Medical Waste 89

Lesson Twelve Miniaturization of Equipment 96

Lesson Thirteen Computers in Education 103

Lesson Fourteen DNA Suggests Cultural Traits Affect Whale’s Evolution 114

Lesson Fifteen Robot 124

Lesson Sixteen A High-Tech Dragnet 134

Lesson Seventeen Fingerprint System Extends Arm of the Law 141

Lesson Eighteen Technical Innovations in Pipeline Coatings and Their Impact on the Environment 150

Lesson Nineteen Machine Components 158

Lesson Twenty The Bermuda Triangle：A Mystery of the Air and Sea 165

Lesson Twenty-One Lost and Found in Orbit 174

Lesson Twenty-Two Cardiac Contagion 181

Lesson Twenty-Three Digital Divide 191

Lesson Twenty-Four An Attack on Aging 201

Lesson Twenty-Five Save the Swordfish 208

Lesson Twenty-Six Manual：Milling Machine 214

Lesson Twenty-Seven Transistor 220

Lesson Twenty-Eight Once more with Feeling 230

Lesson Twenty-Nine The Bits and Bytes of Voice 241

Lesson Thirty Tangled in the Net 251