胎头浮或半固定矫正胎方位成功率高，相比差异有显著性（P<0.05）。
When the fetuss head is floating or half - fixed, the success rate of position correction is higher, significant difference was found (P< 0.05) .
半阴偏振镜是精确确定和测量平面偏振光的偏振方位的重要器件。
The half-shade Polarization prism is an important de- vice for determining and measuring accurately the azimuth of a beam of Plane Polarized light.
在其星象跟踪仪出故障导致其自身再也不能准确计算出方位和坐标点之前，飞船整整工作了八年半。
The spacecraft worked for eight-and-a-half years before its star tracker failed and it could no-longer work out its position and point correctly.
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