drone基本解释
n,雄蜂；嗡嗡的声音；懒惰者,同近
An airplane droned overhead..一架飞机在头顶上轰鸣。
雄蜂；嗡嗡的声音；懒惰者英释中释na continuous low dull sound
target drone,目标靶机.短语
