box marking

例句：

1. 1. The box was marked with a special code for easy identification.
   这个盒子上有一个特殊的代码，便于识别。
2. 2. The manufacturer used different colors to mark the products for differentiation.
   制造商使用不同的颜色来区分产品。
3. 3.The box markings were designed to make it easier for customers to find their items.
   包装标记的设计是为了使顾客更容易找到他们的商品。