spacecrafts

常见例句

• How many spacecrafts are orbiting the moon?
  有多少航天器绕月球轨道飞行？
• The rotation dynamic and quaternion kinetic equations of spacecrafts were educed according to the principles of variable-structure control.
  根据滑动模态变结构控制原理，导出了航天器三轴动力学和四元数姿态运动学方程。
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