content and ration

• 质量分数

content and ration的用法和样例：

例句

1. The peridotite xenoliths that their chondrite-normalized normalized PGE patterns are decline have lower gold content.
   而强亏损型橄榄岩包体的铂族元素球粒陨石标准化分布模式呈下降趋势，且对应橄榄岩包体的金质量分数均较低。