单词	undouble
释义	un·dou·ble (ŭn-dŭbəl) tr.v. un·dou·bled, un·dou·bling, un·dou·bles To unfold, as a piece of paper money.
随便看	valence Valence valence band valence electron valence quark valence shell Valencia Valencian Valencia orange Valenciennes Valenciennes lace valency valency Valens -valent Valentina Vladmirovna valentine Valentine Valentine's Day Valentines Day Valentinian I Valentinian II Valentinian III Valentino Vale of

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