水印

例句：

1. 1. The company's logo is a watermark of its brand identity.
   公司的商标是其品牌身份的象征。
2. 2.The artist used a watermark to protect his copyrighted work.
   艺术家使用了水印来保护他的版权作品。
3. 3. The new product has a unique watermark design that distinguishes it from competitors.
   新产品有一个独特的水印设计，使其与竞争对手区分开来。