名詞 gadfly:

1. a persistently annoying person
   同義詞：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。伊俄四處躲藏，游過了大海，這海從些就以她命名叫伊奧尼亞海。

gad.fly

n.（名詞）
【復數(shù)】 gad.flies
A persistent, irritating critic; a nuisance.
討人厭者：總是攪得別人不得安寧的吹毛求疵者；討厭鬼
One that acts as a provocative stimulus; a goad.
刺激：令人振奮的刺激物；激勵
Any of various flies, especially of the family Tabanidae, that bite or annoy livestock and other animals.
虻：尤指虻科的一種搔擾或咬食牲畜及其它動物的昆蟲