Lesson One The Nature of Light 1
Lesson Two How Did Magnetism Get Its Name? 12
Lesson Three How Does A Rocket Work? 23
Lesson Four Blood Types 35
Lesson Five Sir Isaac Newton 47
Lesson Six Black Holes 58
Lesson Seven XRays 69
Lesson Eight The Copernican Revolution 82
Lesson Nine The Migration of Eirds 93
Lesson Ten Air Pollution 104
Lesson Eleven Future of the Automobile 117
Lesson Twelve Preparatory Stages of Sleep 131
Lesson Thirteen Care of the Teeth 142
Lesson Fourteen Comets 157
Lesson Fifteen Ants 171
Lesson Sixteen What Is Life? 188
Lesson Seventeen Liquid Crystal 201
Lesson Eighteen Cancer 215
Lesson Nineteen Cloning A Human 229
Lesson Twenty Application of Mathematics 243
附录 258
中译英答案 258
课文参考译文 275
总词汇表 326