...地面积] 公亩（等于100平方米） R（radii 的缩写）半径 T（tangent 的缩写）切线 L（length 的缩写）长度 E（external distance 的缩写）外距【进行道路平面设计时，路线的交点到该交点平曲线的QZ（曲中）点的距离。
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A simple inertial or Doppler navigation has a common defect that position errors are always increasing with flight time or distance, therefore an external reference system is necessary.
纯惯性导航或多普勒导航的一个共同缺点是：一般都具有随时问或距离增长的位置误差，这就需要有一个外基准系统。
The environment coefficient usually relates to some external environment factors, such as the distance to genetic sag and the contact degree to frontal sand body of delta.
环境系数通常与距离生油凹陷的远近及与三角洲前缘砂体的接触程度等外部环境因素有关。
The results show that the shock standoff distance, skin friction coefficient and surface heat flux all increase with the strengthening of the external dipole magnetic field.
计算结果表明，外加偶极子磁场使激波脱体距离增加，壁面摩擦系数和表面热流密度增大。
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