This is our fight against the world
All you have to do is enter keywords.
We fight against the world.
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As for your supplement:
You can also consider these two elegant sentences:
We stare at the world together, and we stare at the world together.
The world is ours (Shakespeare)
The second sentence is similar to what we mean against the world, but more positive, optimistic and elegant.
I am a Canadian, and I used to be an English teacher.