droning

adj.

发嗡嗡声的，声音低沉单调的；

v.

发出嗡嗡声( drone的现在分词 )；（以低沉、单调的声调）谈；说；唱

target drone目标靶机

1. Airplanes kept on droning in the distance throughout the night.
   整个夜晚，远处的飞机隆隆地响个不停。
2. A droning, mechanical delivery of the speech.
   一篇低沉单调、呆板的演说

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