passive air defense 中文意思是什麼
passive air defense
解釋
消極防空-
The traditional air defense system which detect and attack targets only depend on ordinarily radar was in an exceedingly passive position and difficult to ward off blows when the cruise missile was used in war
它的出現使得傳統的僅僅依靠普通雷達探測目標和引導武器射擊目標的防空系統處于極端被動和難以招架的局面。
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