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1．What Plants Need To Grow Well植物生长所需的条件1

2．Faraday and His Generator法拉第和他的发电机8

3．Amusing Experiments有趣的实验17

4．Soil土壤26

5．Solar Power太阳能34

6．Changes in the World Around Us我们周围发生的各种变化43

7．Oil in the Earth地下石油53

8．Gravity重力61

9．Is Friction Good or Bad？摩擦有益还是有害？69

10．Dust灰尘78

11．Killing Pain止痛87

12．The Discoverer of X-raysX射线的发现者97

13．What Helicopters Do for Us直升飞机可以为我们做什么107

14．Uses of Atoms原子的用途117

15．Television:A Modern Wonder of Electronics电视：现代电子学的奇迹126

16．The Long Chain of Evolution漫长的进化过程135

17．Pandas熊猫146

18．Advances in Materials材料的改进156

19．Machines Might Have Intelligence机器可能有智力166

20．The Mechanism of a Fish鱼的机制176

21．The First Earthquake Recorder第一个地震记录仪185

22．The Laser激光195

23．Wonders of the Deep Sea深海奇观204

24．Imitating Nature模仿自然215

25．The Atom and Dr Einstein原子与爱因斯坦博士227

Chinese Translation of Texts for Reference参考译文237

Key to Exercises练习答案272