熟练的体操运动员做复杂的旋转动作 Skilled gymnast doing a complex pirouette

穿着紧身衣的技术娴熟的年轻体操运动员在空旷黑暗的健身房里，在平衡木上做着一个非常复杂的单足旋转。

Skilled young gymnast in a leotard doing a pirouette of great complexity, in an empty and dark gym, on a balance beam.