The round rate of this kind of glass bead are as high as 90% with very low impurity.
此类玻璃珠的成圆率高达90%以上，杂质含量极低。
The metastable zone is narrowed, and the crystal growth rate is increased in the presence of calcium acetate as an impurity.
醋酸钙杂质的存在使木糖溶液介稳区变窄，晶体生长速率加快。
The influences of oxygen impurity influx rate and confinement time on intensity and switch-on time of line emissions are surveyed numerically.
用数值计算分别考察了氧杂质进入通量和约束时间对谱线峰值强度和起始时间的影响。
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