通过控制导航条的状态来跟踪和展示用户当前位置很困难，成本很大时，用它来替代标签。
Use instead of tabs when it would be prohibitively expensive to track and display the current location of the user as a state in the navigation control.
低空导航与夜视寻的红外吊舱，尽管它是设计用来精确投掷激光制导炸弹的，但它还能够用来帮助我们确认被救援者的位置并且连续跟踪地面与空中的目标。
The LANTIRN pod, though it's designed to deliver laser-guided bombs precisely to a target, allows us to locate the survivor and keep track of things on the ground and in the air.
给出一个实例：用实时测量数据解算出飞行器制导目标的位置，并在电子地图上显示。
An instance is given where the positions of guided targets are derived from realtime measurement data and are displayed on electronic maps.
在红外制导系统中，目标检测技术能够提供目标的形状和位置信息，成为必不可少的关键技术之一。
Target detection technology is one of the key issues in the infrared guidance system, because it can offer the location and shape information of target.
该预测制导法分两个过程：预报落点位置和最优横向力搜索。
This prediction guidance method is divided into two: prediction of impact ground location and search of optimal lateral force.
定义了末段制导启控时的期望位置；
定义了末段制导启控时的期望位置；
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