At the beginning of landing, the position and attitude of spacecraft can be estimated by using feature matching with the 3D shape features database builded during the rotation phase.

着陆段初期，将局部图像提取的特征点与绕飞段建立的特征点数据库进行匹配，结合小天体三维模型，确定探测器在小天体固连坐标系下的位置、姿态等信息；

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CONCLUSION: at the beginning phase of rotation, the common injuries of knee joint of the athletes are left knee medial accessory ligament and meniscus.

结论：旋转开始阶段，运动员膝关节易发生左膝内侧副韧带损伤和膝内侧半月板损伤。

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Make sure all the input and output cabling has been performed correctly and check the input phase rotation.

确保所有输入输出电缆线路设置正确，并检查输入相位旋转。

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The first phase of the fellowship will include a three month rotation amongst various departments where the scholars will be exposed to the internal structures that constitute a baseball franchise.

FORBES: Advancements in Recruiting Could Create a New Generation of Baseball Executives

"If the sudden frequency change is neglected, then after only eight hours, a complete rotation of the pulsar is lost in our counting, and we can no longer determine at which rotational phase the gamma-ray photons reach the detector aboard Fermi, " Pletsch explained.

MSN: Oddball pulsating star hiccups as it spins