| 单词 | acre-foot |
| 释义 | > as lemmasacre-foot acre-foot n. a unit of volume equal to one acre in area and one foot in depth (approx. 43,600 cubic feet, 1200 cubic metres), typically used for water. ΘΚΠ the world > relative properties > measurement > the scientific measurement of volume > [noun] > volume of water one acre by one foot acre-foot1889 1889 Jrnl. Amer. Geogr. Soc. N.Y. 21 143 We measure water by acre feet. This is something we devised in the last season. 1944 Jrnl. Sedimentary Petrol. 14 19/2 Between 15,500 and 11,500 acre-feet of upland soil. 2005 High Country News 21 Mar. 11/1 By the 1970s, Arizona was overdrafting its aquifers by about 2.2 million acre-feet a year. < as lemmas |
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