扇形地堑的英文：
sector-graben

It's the private sector, stupid!
是私人部门出了问题，傻瓜！

regional conference on the private sector
私营部门问题区域会议

This stifles the development of the financial sector.
这就遏制了金融部门的发展。

So this is sector five?
这里就是第五区域？

The playing field is a large sector.
比赛场地是一个扇形的。

A graben creates a favourable setting for uranium deposition
地堑成为铀矿沉积的有利部位。