发布于：2025-07-06 06:12浏览量：145文/优校网
1.【数】扇形(面)
2.防(御分)区;扇形战区;方面战区;阵线
3.函数尺;两脚规
4.【机】扇形齿轮
1.【数】扇形(面)
2.防(御分)区;扇形战区;方面战区;阵线
3.函数尺;两脚规
4.【机】扇形齿轮
1.a part of a country’s economic or business activity; a group that is part of a larger group
2.a part of an area, especially an area that is controlled by the military
3.a part of a circle that is formed by drawing two straight lines from the center to the outer edge