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汉语拼音：shuǐ zhì

1.指水的物理性质和化学成分。前者包括水的温度﹑颜色﹑透明度﹑味道和气味;后者包括所含各种矿物质的成分和含量。

1. 指水的物理性质和化学成分。前者包括水的温度、颜色、透明度、味道和气味；后者包括所含各种矿物质的成分和含量。

• Some people are still suffering ill effects from the contamination of their water.

  一些人仍在承受水质受污染的恶果。

• That subsection allows variances based on water quality considerations.

  那条细目基于对水质的考虑,允许有差异.

• Water quality has played a lesser role in regulating industrial sources.

  水质在管制工业污染源方面发挥的作用并不大.

• Many people were dependent for their water supply on this pestilential stream.

  许多人靠这条水质受污、可致疫病的河流来取水。

• They set up purifying systems in places where the water was not potable.

  他们在许多水质不适合饮用的地方建立了净化系统。

• The waters are crystal clear and offer a superb opportunity for swimming.

  这片水域水质清澈，是游泳的绝佳场所。

• 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.

• 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.

• 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.

• Water pollution imperils all kinds of marine life.

  水质污染危及所有海洋生物.

• The Clean Water Act was amended by the Water Quality Act of 1987.

  《洁净水法案》在1987年修改成《水质法案》.

• 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.

• 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.

• 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.

• 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有机农药对水质的影响问题.