科技英语教程 下PDF电子书下载

Lesson One 1

Eating Disorders 1

Lesson Two 9

New Scientific Breakthroughs 9

Lesson Three 17

The Popular Science 17

Lesson Four 28

Improving Gene Transfer in Livestock 28

Lesson Five 36

Electrical and Electronic Engineering in the Future 36

Lesson Six 44

Fuel for thought 44

Deep Chill Triggers Record Ozone Hole 53

Lesson Seven 53

Lesson Eight 60

Sea Otter Declines Blamed on Hungry Killers 60

Lesson Nine 71

The Science that Imitates Nature s Mechanisms 71

Lesson Ten 82

Information Handling Systems 82

Lesson Eleven 89

Medical Waste 89

Lesson Twelve 96

Miniaturization of Equipment 96

Lesson Thirteen 103

Computers in Education 103

Lesson Fourteen 114

DNA Suggests Cultural Traits Affect Whale s Evolution 114

Robot 124

Lesson Fifteen 124

Lesson Sixteen 134

A High-Tech Dragnet 134

Lesson Seventeen 141

Fingerprint System Extends Arm of the Law 141

Lesson Eighteen 150

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

Lesson Nineteen 158

Machine Components 158

Lesson Twenty 165

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

Lesson Twenty-One 174

Lost and Found in Orbit 174

Lesson Twenty-Two 181

Cardiac Contagion 181

Digital Divide 191

Lesson Twenty-Three 191

Lesson Twenty-Four 201

An Attack on Aging 201

Lesson Twenty-Five 208

Save the Swordfish 208

Lesson Twenty-Six 214

Manual：Milling Machine 214

Lesson Twenty-Seven 220

Transistor 220

Lesson Twenty-Eight 230

Once more with Feeling 230

Lesson Twenty-Nine 241

The Bits and Bytes of Voice 241

Lesson Thirty 251

Tangled in the Net 251