segment of a circle

例句：

1. 1. The map shows thecity's main street as a segmentof the circle.
   地图显示城市的主街是圆的一部分。
2. 2. The scientist divided the sampleinto several segments for testing.
   科学家将样本分成几个部分进行测试。
3. 3. Thebook is divided into sectionsthat are easy to read andunderstand.
   这本书被分成易于阅读和理解的章节。