tertial

Application of half-natural ecological treatment systems which possessing tertial treatment...

三是积极开展水道技术的研究和应用。

Out in the open in the fine snow of Hokkaido cluster the great white cranes, the black tertial plumes of their broad wings arranged over their rumps like elegant bustles.

在北海道的旷野，丹顶鹤群聚在柔细的白雪，双翅醒目的黑色毛优雅地围在尾，很像贵妇优雅的裙撑。