Application of half-natural ecological treatment systems which possessing tertial treatment... 三是積極開展中水道技術(shù)的研究和應用。
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. 在北海道的曠野上，丹頂鶴群聚在柔細的白雪上，它們雙翅上醒目的黑色羽毛優(yōu)雅地圍在尾部，很像貴婦優(yōu)雅的裙撐。