单词	air letter
释义	air letter noun 1 : an airmail letter 2 : a sheet of airmail stationery that can be folded and sealed with the message inside and the address outside Word History First Known Use 1918, in the meaning defined at sense 1
随便看	callously callousness callousnesses callousser calloussest callout callow callower callowest callowness callownesses callows calls calls (for) calls (off or out) erotomania erotomaniac erotomanias erotylid Erotylidae Erpetoichthys ERPO err err on the side of err on the side of caution

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