In posterior positions, at 0 Station, the biparietal diameter is still a couple centimeters above the pelvic inlet, meaning that the head is not fully engaged.是什么意思_In posterior positions, at 0 Station, the biparietal diameter is still a couple centimeters above the pelvic inlet, meaning that the head is not fully engaged.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句