第三章研究了基于先验弹道模板的主动段战术参数估计与落点预报问题。
Chapter III studies tactical parameters estimation of boost phase and impact position prediction problems based on prior trajectory profile.
如果能在火箭主动段加一套简易的控制系统来控制火箭的姿态，则将大大提高火箭的命中精度。
The precision of hitting will be improved obviously if we can offer a set of simple guidance control systems in powered phase of the rocket projectile.
为使飞行器能在主动段很快地进入到理想弹道上，系统采用了非线性的推力向量控制及预测制导方法。
In order to enter into the ideal trajectory with minimal energy, the nonlinear thrust vector control and the prediction guidance are adopted in the missile guidance control system.
经过一段时间，我发现他开始主动向我征询意见，因为他知道我不会冲他夸夸其谈，大喊大叫，或是溜须拍马，而是会提出真诚而有用的建议。
Over time I found that he started turning to me.He knew I wouldn't rant and rave at him, nor kiss up.Instead, I would offer candid, helpful advice.
积极主动地开始一段对话。
如果你想开始一段友谊，就主动地说“你好”，试着交往，然后随机应变！
If your mission is to start a friendship, say "Hello"; get up in the air, and see what happens!
一个男人会主动开始一段谈话，第一个站出来询问需要什么，第一个把“我爱你”甜蜜自然地说出口。
A man is the first to initiate a conversation, the first to ask for what's needed, and the first to say "I love you."
表面光滑的正常两肾间，可见一小段主动脉。
A small segment of aorta is seen between the normal, smooth-surfaced kidneys.
经过一段时间，我发现他开始主动向我征询意见，因为他知道我不会冲他夸夸其谈，大喊大叫，或是溜须拍马，而是会提出真诚而有用的建议。
Over time I found that he started turning to me. He knew I wouldn't rant and rave at him, nor kiss up. Instead, I would offer candid, helpful advice.
ICM左室大多数呈“圆拱门形”心尖圆钝变薄、收缩期运动明显低平，节段性室壁运动障碍及主动脉增宽为其特点。
The patients with ICM were characterized by thin spherical apex of left ventricle with hypokinesis, regional wall motion and dilated aorta.
ICM左室大多数呈“圆拱门形”心尖圆钝变薄、收缩期运动明显低平，节段性室壁运动障碍及主动脉增宽为其特点。
The patients with ICM were characterized by thin spherical apex of left ventricle with hypokinesis, regional wall motion and dilated aorta.
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