双石英 biquartz

双石英片 bi-quartz ; [光] biquartz

双石棋 Two Stone

双石英透镜 Fused UV Silica Lens

双石英楔 biquartz wedge

双棘石斑鱼 Epinephelus diacanthus ; doublethorned grouper

双色石脂鲤 Brycon bicolor

中美双方战略石油储备主管部门 U.S. and China strategic petroleum reserve authorities

双晶石 [矿物] eudidymite

钠长石双晶 albite twin ; albite twinning ; albite e twin