rotate mode flag

例句：

1. 1. Thedevice has a rotating mode flag that allows you to switch between different modes easily.
   该设备有一个旋转模式标志，可以让你轻松地在各种模式之间切换。
2. 2.The flag is displayed on the side of the building to indicate the direction of the main entrance.
   旗帜挂在建筑物的侧面，用来指示主入口的方向。
3. 3. The flag was flown at half mast during the national mourning period.
   在国家哀悼期间，国旗被降半旗。