短語(yǔ)詞組短語(yǔ)fine gravel [地質(zhì)]細(xì)礫;細(xì)礫石fine gravel aggregate 細(xì)礫骨料low fine gravel 細(xì)砂含量低的礫石fine gravel soil 細(xì)粒土fine filling gravel 細(xì)礫石 返回 gravel fine