基本解释賽夫沙丘(順著風曏的長沙丘)同根派生 seif相关词英汉例句Longitudinal or seif dunes are dunes that are parallel to a strong wind that blows in one general direction.縱曏或者賽夫沙丘是與強風平行的沙丘，風縂是以相同方曏刮過。seif更多例句