![opal造句怎么写]( "opal造句怎么写")
- Aclear,colorlessopal.reflectlightorcolorslikeanopal.areddishopalwithsmallpatchesofbrilliantcolor.emitaplayofcolors,likethoseofanopal.AlltheOPECopalintheOpelisopaque.Intheopalcuttingprocessthepotchisgroundawayfromthepresentationareasofthegemopal.Thisi...
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