the economist often have a dog-fight

Those fighters just had a dog-fight in the sky.
Every dog has its day.
This  is a dog-eat -dog world.

dog-fight, Every dog has its day

Those fighters just had a dog-fighter in the sky.

Dog has it's day

This is a dog-eat-dog world

every dog have it's day

Those fighters just had a dog-fight in the sky.

dog-fight
难道是狗撕猫咬的意思?

Those   fighters    just     had   a    dog  - fight    in   the   sky.
This   is   a   dog -eat  -dog   world.

Look!  Some boys are having a  dog-fight on the playground!

those fighters just has a  dog fight in the sky
this is dog eat dog world
every dog has its day