A study of the difference on color and porcelain-metal strength between Au-Pt alloy porcelain and Ni-Cr alloy porcelain是什么意思_A study of the difference on color and porcelain-metal strength between Au-Pt alloy porcelain and Ni-Cr alloy porcelain在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句