单词	derived fossil
释义	derived fossil 衍生化石
随便看	primary processor primary process thinking primary procuction phase primary producer primary producer country primary producing country primary product primary production primary production and biomass primary production equipment primary production of phytoplankton primary productive force primary productive forces primary productive relations primary protein derivative primary protein structure Primary Protein Structure primary productivity primary productivity analyzer primary productoin primary products primary products quality primary product trade primary profile primary program