The man who had conducted her retired at once, and some one came softly round the angle of the bed-curtains.
领她走的人立刻退了下去, 有人轻轻地绕过床单的角走了过来。
英语百科
Turn (geometry)
A turn is a unit of plane angle measurement equal to 2π radians, 360° or 400 gon. A turn is also referred to as a revolution or complete rotation or full circle or cycle or rev or rot.
A turn can be subdivided in many different ways: into half turns, quarter turns, centiturns, milliturns, binary angles, points etc.