单词	hollow-core slab
释义	hollow-core slab 空心板
随便看	demands of customers demands of development demands of human dignity demands of market demands of morals demands of readers demands of reception Demands of service demands of society demands of the industry demands of the labor market demands of the people demands of the service sector demands of value demand solution demand something demand something from somebody demand something of somebody demand special privileges demand spectra demand spectrum Demands specific to the job demand stability demand staging demand status