narrow frequency band

• 窄带

narrow frequency band的用法和样例：

例句

1. The narrow band of sapwood is very similar in colour to the heartwood.
   边材的窄带颜色与心材非常相似。
2. Some adhering junctions are present as narrow bands connecting two cells.
   有些粘附连接以一窄带的形式连接两个细胞。