单词	ultrabasic
释义	ultrabasic adjective ul·​tra·​ba·​sic ˌəl-trə-ˈbā-sik  : extremely basic an ultrabasic system specifically : very low in silica and rich in iron and magnesium minerals dunite and peridotite are ultrabasic rocks ultrabasic noun Example Sentences Recent Examples on the Web Rwanda has introduced ultrabasic health insurance for more than 90% of its people; infant mortality has fallen from 120 per 1,000 live births in 2000 to under 30 last year. The Economist, 28 Apr. 2018 Word History Etymology International Scientific Vocabulary First Known Use 1881, in the meaning defined above
随便看	acinarious Acineta acinetae acing acing (out) acing out acini aciniform acinonyces Acinonyx acinonyxes acinoses acinosses acinotubular acinous acinus Acipenser Acipenseres acipenseres acipenserid acipenseridaes acipenserine acipenseroid acipenseroidei acipensers

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