n.床垫，混凝土地面...

The bed of old people adds thick mattress with hard mattess or hard bedplate had better.老年人的床以硬床垫或硬床板加厚褥子为好.Conditional word, a Bao Jie can be added to fill up between mattess and sheet.有条件的话, 可以在床垫和床单之间加一层保洁垫....

mattess的音标：mattess的英式发音音标为：['mætɪs]mattess的美式发音音标为：['mætɪs]...