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  1. ...-echo Radar)」與僅能偵測活動目標卻無法偵測距離的「連續波雷達( Continuous - wave Radar)」,發展到後來能同時偵測目標距離與活動目標的「頻率調變連續波...

  2. ...know, Rome was not built in a day. I believe that after continuous hard study, one day I can speak English very well. If you want...