多目标拦截是弹道导弹防御的重大难题，也是目前美国导弹防御系统所遇到的最大的技术难点。
Multitarget interception is a big difficult problem in ballistic missile defense, and is also the most arduous technology of the missile defense system of US.
多目标拦截是弹道导弹防御的重大难题，也是目前美国导弹防御系统所遇到的最大的技术难点。
Multitarget interception is a big difficult problem in ballistic missile defense, and is also the most arduous technology of the missile defense system of US.
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