monometallic standard

例句：

1. 1. The adoption of this monometallic standard has greatly improved the efficiency of our production process.
   采用这一单金属标准大大提高了我们的生产过程效率。
2. 2.In the field of metallurgy, the monometallic standard is widely used to ensure the quality of steel products.
   在冶金领域，单金属标准被广泛使用以确保钢铁产品的质量。
3. 3.The monometallic standard has become a crucial tool for measuring the purity of metals and alloys.
   单金属标准已成为衡量金属和合金纯度的关键工具。