数字信号广播（ Digital Audio Broadcasting 简称DAB）是继AM、FM传统模拟广播之后的第三代广播--数字信号广播，它提供了接近CD质量的声音，广播及商机无限的附加数据服务，具有抗噪声、抗干扰、抗电波传播衰落、适合高速移动接收等优点，保证固定、携带及移动时接收信号的质量。
[ 复数 dabs 第三人称单数 dabs 现在分词 dabbing 过去式 dabbed 过去分词 dabbed ]
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V-T/V-I If you dab something, you touch it several times using quick, light movements. If you dab a substance onto a surface, you put it there using quick, light movements. 轻擦; 轻敷
She arrived weeping, dabbing her eyes with a tissue.
她哭着来了，用纸巾轻擦着眼睛。
She dabbed iodine on the cuts on her forehead.
她在她额头的伤口处搽了碘酒。
N-COUNT A dab of something is a small amount of it that is put onto a surface. 少量 [非正式]
...a dab of glue.
…一点胶水。
N a small common European brown flatfish, Limanda limanda, covered with rough toothed scales: family Pleuronectidae: a food fish 比目鱼
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