A central ring creates an ovular oculus which is the center-point of the space.

个中心环状横梁在整个空间的中央建个圆形舞台。

The feature of ovular uterine bleeding disorder is regular menstrual cycle with short cycle, abnormal heavy menstruation, longer period but self ceasing.

有排子宫异常出血月相对有规律，主要表现为缩短、量异常增多、较长但能自止。