单词	D region
释义	D region noun : the lowest part of the ionosphere occurring approximately between 30 and 55 miles (50 and 90 kilometers) above the surface of the earth Word History First Known Use 1930, in the meaning defined above
随便看	burnables burnablest Burnaby burnbeat Burne-Jones burned burned (up) burned away burned down burned in burned off burned one's ears burned out burned through burned to a crisp burned to a frazzle burned up burned-out burned-over burner burner man burner phone burners burnet burnet bloodwort

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