GbEng
扇形体形状似四分之一圆圈的机器零件或其他机械设备 A machine part or other mechanical device that is shaped like a quarter circle.
士兵们在山腰上成扇形散开,搜索那个男人。 The soldiers fanned out across the hillside in their search for the man.
部队向前推进时呈扇形散开 The troops fanned out as they advanced.