• 散沙

loose hub松衬套looseadj.松的；宽松的；不确切的；不牢固的；放纵的n.解放；放任；放纵v.弄松；释放；放枪adv.松散地loose and strict combination宽严相济Loose-leaf bulk curing barn散叶密集烤房loosely coupled communication松耦合通信Loose Source and Record Route宽松的源站及记录路由； n.；松散源和纪录路由loose connection in electrode电极连接脱落loose ma-for-man defiance松动的人盯人防守loose covering for the breast肚兜Looser's transformation zones送报生loose braided outer conductor稀疏编织外导体Loose sandstone gas reservoir疏松砂岩气藏

1. Dunes are ridges of loose sand heaped up by the wind.
   沙丘是散沙被风吹起堆积而成的。