sector radio marker

例句：

1. 1. The satellite's orbit is divided into several sectors.
   卫星的轨道被分成几个扇区。
2. 2.The company has a strong presence in the manufacturing sector.
   该公司在制造业领域有很强的影响力。
3. 3.The map shows the distribution of various sectors across the city.
   地图显示了城市各个区域的分布情况。