| 单词 | ph value |
| 释义 | > as lemmaspH value pH value n. ΚΠ 1915 Science 19 Nov. 735/1 The pH values given were obtained by titration with phosphate and acetate mixtures. 1946 J. W. Day Harvest Adventure iii. 44 Every acre of arable land has had a dressing of chalk. In all..some 30,000 tons have been put down, the idea being to maintain a pH-value of 5. 1992 D. M. Elsom Atmospheric Pollution (BNC) (ed. 2) 84 An even lower pH value of below 2.0 was unofficially recorded during a rainstorm in Wheeling, West Virginia, in 1978. < as lemmas |
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