| 单词 | tar-sand |
| 释义 | > as lemmastar-sand tar-sand n. a deposit of sand impregnated with bitumen. ΘΚΠ the world > the earth > minerals > mineral sources > [noun] > tar-sand tar-sand1899 1899 Nature 15 June 159/1 Great trouble has been experienced in the effort to penetrate the ‘tar-sands’ at the base of the Cretaceous strata. 1927 Daily Express 19 Aug. 6/1 There are tar-sand areas which can be made to produce great supplies of oil and road-paving materials. 1978 Nature 29 June 703/3 The heavier oils will also have to be used as chemical feedstocks in the future: for example, Canada's ‘tar sands’, now the subject of a multi-million dollar project in Alberta. < as lemmas |
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