常見例句雙語例句Whole wheat flour is a powdery substance derived by grinding or mashing the wheat's whole grain.全麥面粉是由研磨或搗碎整個小麥所得。An in service valve suffering from Dezincification has a white powdery substance or mineral stains on its exterior surface.應用中的閥門如果出現(xiàn)脫鋅現(xiàn)象，在產(chǎn)品表面就會出現(xiàn)粉狀物質(zhì)或礦物污點。The physical attributes of an in-service valve with Dezincification includes a white powdery substance or mineral stains on its exterior surface.使用中的閥門出現(xiàn)失鋅想象時的物理特征包括：在外表面出現(xiàn)白色粉末或 礦物污點。http://dj.iciba.com權(quán)威例句The powdery lignin, once separated from the cellulose, is a very useful substance in its own right.FORBES: Ethanol 返回 powdery substance