埃及自古代起就使用釉料.Glazes had been used from ancient times in Egypt.2.釉料的脱羟基温区较宽,胎料的脱羟基温区较窄,这对保证天青色汝瓷的质量是有益的.They are beneficial to ensure the quality of sky - green Ru porcelain.并说明了其在陶瓷釉料生产中所扮演的重要角色.It explains important role...
The airlines have invested enormous sums in new, quieter aircraft.航空公司投入了大笔资金购买噪音较小的新型飞机。Each week she meticulously entered in her notebooks all sums received.每个星期她都细心地在笔记本上记下所有收到的款项。I can't do my sums.我算不出来。...