| 1. | The ultimate source of energy of all ecosystems is the sun .
太阳是一切生态系统能量的基本来源。 |
| 2. | It should be emphasized that the laser is in no sense a source of energy .
应当强调指出，激光器绝不是一个能源。 |
| 3. | It has not been possible to study the source of energy in any detail .
对于这种能源，过去一直不可能进行细致的研究。 |
| 4. | Hydrogen to helium conversion provides the prime source of energy for stars on the main sequence .
由氢向氦的转变是主序星能量的主要来源。 |
| 5. | Differences between the energy levels of molecules are the sources of energy for all living cells and organisms .
所有活细胞或生物体能量的来源是分子能级的差别。 |
| 6. | The view that phosphocreatine was the direct source of energy for muscular contraction lasted only a few years .
认为磷酸肌酸作为肌肉收缩直接能源的观点，流行了不过数年。 |
| 7. | With the tools, they added meat to their diet, a richer source of energy and protein than plants .
使用这种工具，他们的食物中增添了肉类。肉比植物提供更丰富的能量和蛋白质。 |
| 8. | As the atmosphere slowly became rich in oxygen, life changed to take advantage of oxygen as a source of energy .
随着大气中氧慢慢地增多，生命也就变得喜欢用氧作为自己的能源。 |
| 9. | It is inconceivable that so strong a source of energy can be switched on and off in as little time as 1/30 second .
真难以想象如此强的能源可在130秒这样短的时间内关闭和开启。 |
| 10. | Atomic energy is the greatest source of energy existing
原子能是现存的最大的能源 |
