contribute v.贡献;捐献;有助于 convenient adj.便利的、方便的 conversation n.谈话、交谈 convince vt.使信服;说服 damage vt.毁坏、损害‖n.损失 decline v.&n. 拖延 decorate v.装饰、修饰 decrease v.&n.减少、减小 defeat vt.击败‖n.失败 defend v.防守、保卫;...