Preface 1
Unit One 1
Part One Discourse Features 1
Preface 1
Sample A Preface 2
Sample B Editor's Foreword 5
Sample C Preface 13
Sample D Preface 20
Part Two Readings on Scientific Topics 26
Electronics 26
Passage A 26
Passage B 33
Passage C 37
Passage D 44
Unit Two 53
Part One Discourse Features 53
Definition 53
Sample A Analogy and Memory 61
Sample B The Heat Engine 66
Sample C Matter,Mass and Energy 73
Part Two Readings on Scientific Topics 81
Energy 81
Passage A 81
Passage B 92
Passage C 99
Passage D 104
Unit Three 113
Part One Discourse Features 113
Classification and Comparison 113
Sample A Surveying 117
Sample B Classification ofSmall Dams 123
Sample C Metals 130
Part Two Readings on Scientific Topics 136
Transport and Communication 136
Passage A 136
Passage B 145
Passage C 153
Unit Four 164
Part One Discourse Features 164
Structuer and System 164
Sample A And Now It is Pond Power 166
Sample B The Champion Scrubber—Polisher 172
Sample C Systems 178
Part Two Readings on Scientific Topics 184
The Living Sea 184
Passage A 184
Passage B 193
Passage C 206
Unit Five 219
Part One Discourse Features 219
Process 219
Sample A Pig—iron Production 221
Sample B Machine Papermaking 227
Sample C Whiskey Production 234
Part Two Readings on Scientific Topics 240
Industrial Civilization 240
Passage A 240
Passage B 247
Passage C 253
Glossary 260