| 1. | Physicists believe in the validity of conservation laws .
物理学家们对于各种守恒定律的有效性一直是坚信不疑的。 |
| 2. | The potential of such a primary geochemical survey is demonstrated .
这类区域性的地球化学测量显示出它的有效性。 |
| 3. | All the water retained in a soil is not equally available to plants .
保留在土壤中的全部水分对植物的有效性是不一致的。 |
| 4. | It is, of course, very easy to improve the efficiency of the greedy algorithm .
当然，贪婪算法的有效性是很容易改进的。 |
| 5. | The analyst's judgement then must override mathematical and statistical significance .
分析家的判断必须超越数学和统计的有效性。 |
| 6. | The availability of similarity solutions to subsurface hydrologic problems is limited .
地下水文学问题相似求解的有效性是受到限制的。 |
| 7. | In a "read" operation, a "ready" status or signal will indicate the availability of data .
在“读”操作时，用一个“就绪”状态或信号表示数据的有效性。 |
| 8. | The abundance and availability of water and nutrients in a soil ecosystem determine its fertility .
土壤生态系统中水分和养分的丰度和有效性决定土壤的肥力。 |
| 9. | Doubts about the effectiveness of secondary education also show themselves in ideas of curricular reform .
对中等教育有效性的怀疑同时也反映在课程改革的思想上。 |
