gadfly

名词 gadfly:

1. a persistently annoying person
   同义词：pest, blighter, cuss, pesterer
2. any of various large flies that annoy livestock

1. She sent a gadfly to torment Io, who, in her flight, swam through the sea, named after her, Ionian.
   她派遣了一只牛虻去折磨伊俄。伊俄四处躲藏，游过了大海，这海从些就以她命名叫伊奥尼亚海。

gad.fly

n.（名词）
【复数】 gad.flies
A persistent, irritating critic; a nuisance.
讨人厌者：总是搅得别人不得安宁的吹毛求疵者；讨厌鬼
One that acts as a provocative stimulus; a goad.
刺激：令人振奋的刺激物；激励
Any of various flies, especially of the family Tabanidae, that bite or annoy livestock and other animals.
虻：尤指虻科的一种搔扰或咬食牲畜及其它动物的昆虫