| 1. | Quality standards selected depend on intended use of the water .
水质标准的选择取决于水的预定用途。 |
| 2. | We should protect the basin with regard to water levels and water quality .
我们应保护盆地以利水位与水质。 |
| 3. | Slow degradation of ground water quality may result from repeated use .
循环使用地下水可以导致缓慢的水质降低。 |
| 4. | Quality objectives must be set, and quality of water must be maintained .
所以，必须建立水质标准，并坚持水质要求。 |
| 5. | In many cases, the important factor becomes the quality rather than quantity of water .
在许多情况下，重要的因素是水质而不是水量。 |
| 6. | The quality of dilution water, which if contaminated leads to incorrect bod values .
稀释水水质受到污染就会导致求得的BOD值不够准确。 |
| 7. | One concern that is direct and easily recognized by man is the effect on water quality .
直接而又容易觉察到的问题就是对水质的影响问题。 |
| 8. | More refined interpretations of the sanitary quality of water were based upon this knowledge .
根据这个道理对水质卫生可作更加精确的解释。 |
| 9. | Stream standards refer to quality of receiving water downstream from the origin of sewage discharge .
水体标准是指污水排放点下游的受纳水体的水质。 |
| 10. | Desirable qualities of water vary according to use and there are a few uses in which sediment in the water is desirable .
对水质的要求，根据用水而变，并且有些用水希望水中有泥沙。 |
