watermark

水印；水位标志英释中释na special design put onto paper, especially bank notes, that can only be seen when you hold it up to the light

在…上印水印（图案）中释vt

1 embed watermark,嵌入水印；嵌入水印滤镜

1 The card has a digital watermark detectable only by electronic cash dispensers..这种卡上带有只能被电子取款机识别的数码水印。