"vanished civilizations"
vanishvi.消失;绝迹;不见了
vanish thread[机] 尽头螺纹
vanish out ofadj.从 ... 中消失
vanish system涂料系统
vanish moment消失矩
vanishing line消视线,消失线,没影线,没影直线
vanishing axis没影轴
vanishing twin胎儿的自然减灭
vanishing lung肺泡消失肺, 消失肺(肺气肿)
vanishing mode消亡模式
vanishing tide失潮