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- The motion of ballistic missiles in the Midcourse Phase was analyzed and modeled.Then the relationship between the precession period of missile warhead and its RCS sequence was discussed. 首先建立了弹道导弹中段目标的进动模型，分析了目标RCS回波数据与进动周期的关系表达式，然后给出了利用目标RCS序列估计进动周期的方法。
- Based on the variation characteristics lying in the RCS sequence, a method of extracting the precession period was proposed.Simulation results demonstrated the efficiency of the method. 仿真实验结果表明，文中提出的方法能够有效估计目标的进动周期。
- That period was a bright page in the history of Chinese literature. 那个时期是中国文学史上光辉的一页。
- Let us hope that the period of this injustice will be over soon. 让我们希望这个不公正的时期很快结束吧。
- Childhood is a period of rapid growth. 幼年是生长迅速的时期。
- He consulted the chronicles of the period. 他参考了这一时期的编年史。
- He had to decide within a given period. 他得在一定时间内作出决定。
- She has a detailed knowledge of this period. 她对这段时期的情况了解地相当详细。
- In that period auto sales hit a14-year low. 这时期汽车销售量达到14年来最低水平。
- In this period, unemployment reaches record levels. 这段时间的失业人数又达到了创纪录水平。
- Which period of history are you studying? 你正在学哪一段历史？
- To move in or be subjected to precession. 产生进动向前运动或被驱向前
- Can you tell me the time period when it was stolen? 能不能告诉我大概什么时候被偷的？
- Chaucer wrote in the late mediaeval period. 乔叟写作的时代是中世纪末。
- To move inor be subjected to precession. 产生进动向前运动或被驱向前。
- She'll be away for an indefinite period. 她将离开一段时间，何时回来未定。
- This gyroscopic motion is called precession. 此陀螺运动叫做进动。
- This was the most difficult period of his life. 这是他一生中最艰难的时期。
- This movement is called precession. 这一移动称为岁差。
- The meeting finally came to a period. 会议终于结束了。
