n.(纸张上的)水印图案；水位标记
v.压制水印
The digital watermark is to prevent pirating. 数码水印图案是用来防止盗版的。
The watermark on the banknote is to prevent forgery. 钞票上的浮水印是用来防止伪造的。
Documents with this kind of watermark are difficult to duplicate. 带有这种水印的文件很难被复制。
