drone

无人机、无人飞行器

The rescue team used a drone to search the flooded valley.

救援队用无人机搜索淹水的山谷。

雄蜂

In a beehive, the drones do not gather any nectar.

在蜂巢里，雄蜂不采集花蜜。

低沉的嗡嗡声、单调声响

The drone of the air conditioner kept me awake all night.

冷气的嗡嗡声让我整晚都睡不著。

嗡嗡作响、发出低沉声

Bees droned lazily among the flowers in the afternoon heat.

午后的暑气中，蜜蜂在花丛间慢慢地嗡嗡作响。

单调地讲、喋喋不休常与 on 连用

He droned on about his new car for half an hour.

他单调地讲了半小时他的新车。