| 单词 | erf |
| 释义 | Word Frequency erf(ɜːf) nounWord forms: plural erven (ˈɜːvən) South Africa a plot of land, usually urban, marked off for building purposes Word origin AfrikaansWord Frequency Erf(ɜːf) noun acronym for electrorheological fluid: a man-made liquid that thickens or solidifies when an electric current passes through it and returns to a liquid when the current ceases |
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