短語詞組短語radar -reflecting distress signal rocket 雷達(dá)反射遇險(xiǎn)信號火箭parachute distress rocket signal 降落傘遇險(xiǎn)火箭信號;跳傘火箭求救信號red star distress rocket signal 紅星遇險(xiǎn)火箭信號 返回 distress signal rocket