tertial

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

三是积极开展中水道技术应用。

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.

在北海道旷野，丹顶鹤群聚在柔细白雪，双翅醒目黑色羽毛地围在尾部，很像贵妇裙撑。