The Germans had to control the air space if they wanted to  successfully cross the Channel into Britain, so they began bombing Royal Air Force centers,   focusing on airbases, ports, radar stations, and airfields.

如果德国人想成功越过海峡进入英国，就必须控制领空，因此他们开始轰炸皇家空军中心，重点是空军基地、港口、雷达站和飞机场。