ContentsUnit 1 Ⅰ．Scientific Reading：Welding 1
Ⅱ．Access to Scientific English 2
Ⅲ．Semi-Scientific Word Study 5
（1）Negligible，Considerable，Substantial（2）Melt，Molten，Smelt（3）Property（4）Bring about，Produce，Cause，Give rise to（5）Critical（6）ConduciveⅣ．Practical Usage of Some Patterns 6
（1）Maximum and Minimum（2）ContentsⅤ．Supplementary Readings and Exercises 7
Reading 1 Air BearingsReading 2 Ozone Depletion and CancerUnit 2 Ⅰ．Scientific Reading：Centrifugal Governors 14
Ⅱ．Access to Scientific English 15
Ⅲ．Semi-Scientific Word Study 17
（1）Contact（2）House，Accommodate（3）Resist，Withstand（4）AdvantageⅣ．Practical Usage of Some Patterns 17
（1）The use of will，can and may（2）ClassificationⅤ．Supplementary Readings and Exercises 18
Reading 1 The Birth of StarsReading 2 Landing on VenusUnit 3 Ⅰ．Scientific Reading：The Petrol Engine 26
Ⅱ．Access to Scientific English 27
Ⅲ．Semi-Scientific Word Study 29
（1）Adopt（2）Apply（3）Exploit，Utilize，Employ（4）Efficiency（5）Attain，AchieveⅣ．Practical Usage of Some Patterns 30
（1）Methods（2）ShouldⅤ．Supplementary Readings and Exercises 31
Reading 1 The Costs of SafetyReading 2 Technology for TunnellersUnit 4 Ⅰ．Scientific Reading：The Jet Engine 40
Ⅱ．Access to Scientific English 41
Ⅲ．Semi-Scientific Word Study 42
（1）Admit，Introduce（2）Speed，Rate（3）Capacity（4）Evolve（5）Generate（6）DevelopⅣ．Practical Usage of Some Patterns 43
（1）Purpose（2）Requirements and NecessityⅤ．Supplementary Readings and Exercises 44
Reading 1 Agronomy in GuatemalaReading 2 Patents and InventionsUnit 5 Ⅰ．Scientific Reading：Radioactivity 52
Ⅱ．Access to Scientific English 53
Ⅲ．Semi-Scientific Word Study 55
（1）Produce，Product，Production（2）Consume，Consumption（3）Inject（4）Eliminate，Get rid of（5）Devise，Device，Instrument，ApparatusⅣ．Practical Usage of Some Patterns 56
（1）Explanation of cause（2）Problems，Difficulties and SolutionⅤ．Supplementary Readings and Exercises 56
Reading 1 FireballsReading 2 Genes in ActionUnit 6 Ⅰ．Scientific Reading：Chain Reaction 63
Ⅱ．Access to Scientific English 64
Ⅲ．Semi-Scientific Word Study 69
（1）Tend，Apt，Inclined（2）Impinge on，Encounter（3）Deflect，Refract，Reflect（4）Diverge，Converge（5）Induce，Aspirate（6）Expel，Exhaust，Eject，Discharge（7）Propagate，DistributeⅣ．Practical Usage of Some Patterns 70
Ratio and ProportionⅤ．Supplementary Readings and Exercises 71
Reading 1 The Schoolroom in the SkyReading 2 Brightening up the DashboardUnit 7 Ⅰ．Scientific Reading：Conductors and Conductivity 78
Ⅱ．Access to Scientific English 79
Ⅲ．Semi-Scientific Word Study 84
（1）Supply，Provide，Fit（2）Equip，Install（3）Allow for，Compensate for（4）Work，Function，Operate，Run（5）Control，RegulateⅣ．Practical Usage of Some Patterns 85
（1）Results（2）ContrastⅤ．Supplementary Readings and Exercises 86
Reading 1 Solar PhysicsReading 2 The Brain Under StressUnit 8 Ⅰ．Scientific Reading：Liquid Pumps 93
Ⅱ．Access to Scientific English 94
Ⅲ．Semi-Scientific Word Study 97
（1）Perform（2）Limit，Restrict，Impair，Impose（3）Effective（4）Factor（5）Stable，Stabilize（6）MaintainⅣ．Practical Usage of Some Patterns 99
（1）It is＋adj．＋to（2）It（is）＋adj．＋thatⅤ．Supplementary Readings and Exercises 100
Reading 1 Automating TransportReading 2 Homes for RefugeesUnit 9 Ⅰ．Scientific Reading：Road Foundations 107
Ⅱ．Access to Scientific English 109
Ⅲ．Semi-Scientific Word Study 112
（1）Dispose of（2）Affect（v）；Effect（n）（3）Deteriorate，Improve（4）Potential（5）Pipe，Tube，Rod（6）Erode，CorrodeⅣ．Practical Usage of Some Patterns 113
Measurement and CalculationsⅤ．Supplementary Readings and Exercises 114
Reading 1 Mycology and Food StorageReading 2 Do Tranquilizers Cause Birth Defects？Unit 10 Ⅰ．Scientific Reading：Suspension Bridges 123
Ⅱ．Access to Scientific English 124
Ⅲ．Semi-Scientific Word Study 127
（1）Value，Evaluate（2）Subject，Subjected，Submit，Undergo，Suffer（3）Proceed，Procedure，Process（4）Agree，Accord，Conform，Comply，Consistent（5）Modify（6）TransformⅣ．Practical Usage of Some Patterns 129
（1）In that...（points of view，etc．）（2）Consider，NeglectⅤ．Supplementary Readings and Exercises 129
Reading 1 The Biological ClockReading 2 An End to Soil ProblemsKey to Supplementary Readings and Exercises 138