vindexvitrain./vi-treyn/US // ˈvɪ treɪn //UK // (ˈvɪtreɪn) //卵磷脂,卵石,卵巢癌,卵巢Definitionsn.noun · 名词1.›the material of which the friable, vitreous layers in banded bituminous coal are composed.Level 3More words in v →