由于参照系—地球—是旋转的，所以在静止参照系中应是呈直线运动，在地球上的观测者看来就成为曲线运动。
Since this frame of reference-the earth –is rotating, motions that would be straight in a stationary frame of reference appear curved to the observer on earth.
离心力：在曲线运动中可明显由物体上观察到的力的组成部分，这种力使物体具有远离曲线中心或旋转轴心的趋向。
Centrifugal force: the component of apparent force on a body in curvilinear motion as observed from that body that is directed away from the center of curvature or axis of rotation.
从体积设计的角度，分析沥青混合料的旋转压实(SGC)曲线，研究在压实过程中沥青混合料体积参数的变化特征。
From the point of volumetric design, the SUPERPAVE gyratory compactor (SGC) densification curves are used to evaluate the variation of volumetric properties of HMA during densification process.
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