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

一个中心环状横梁在整个空间的中央建造了一个圆形舞。

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

有常出血月经周期相对有规律，主要表现为周期缩短、经量常增多、经期较长但能自止。