单词	单纯乐音
释义	单纯乐音 dānchún yuèyīn〔lg.〕simple sound
随便看	concrete sleeper construction of railways concrete sleepered track concrete sleeper grating concrete sleeper gratingconcrete sleepers concrete sleeper lifting frame concrete sleeper, wood insert Concrete sleeve box concrete slope concrete sloping roof concrete sludge concrete sluice concrete slump concrete slump retaining agent concrete slump test concrete slurry concrete small block concrete small cavity block Concrete small hollow block concrete small-scale hollow blocks concrete small-sized hollow block concrete snapping back test concrete snow concrete social class concrete social group concrete sociology