基本解释赛夫沙丘(顺着风向的长沙丘)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.纵向或者赛夫沙丘是与强风平行的沙丘，风总是以相同方向刮过。seif更多例句