additional mark on

例句：

1. 1. The company has added an additional mark on the product to indicate its quality.
   该公司在产品上增加了一个额外的标记来表示其质量。
2. 2. The map had been marked with additional marks indicating the location of different landmarks.
   地图上用额外的标记指示了不同地标的位置。
3. 3. The new policy requires businesses to add additional marks to their products to ensure safety.
   新政策要求企业在其产品上添加额外的标记以确保安全。