standard sand

例句：

1. 1. The company's new product is designed to meet the international standard.
   该公司的新产品设计符合国际标准。
2. 2. The standards for testing the product are very high.
   测试产品的标凈非常高。
3. 3. The standard of living in this area has greatly improved compared to the past.
   与过去相比，这个地区的生活水平有了很大的提高。