Tweeted twitter.com/StackEnglishLL/status/869102629728681984
2 readability and last sentence correction
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I am confused when to use 'in' and 'across' when I am saying something like "This food is most expensive in the world" or "Japan has the biggest aquarium in the world."

This food is the most expensive in the world.

or

Japan has the biggest aquarium in the world.

I think "in the world" is correct for the sentences I wrote. But when should I use "across"? Would the sentence still be correct if I said "Japan has the biggest aquarium in the world"?

Japan has the biggest aquarium across the world?

I am confused when to use 'in' and 'across' when I am saying something like "This food is most expensive in the world" or "Japan has the biggest aquarium in the world."

I think "in the world" is correct for the sentences I wrote. But when should I use "across"? Would the sentence still be correct if I said "Japan has the biggest aquarium in the world"?

I am confused when to use 'in' and 'across' when I am saying something like

This food is the most expensive in the world.

or

Japan has the biggest aquarium in the world.

I think "in the world" is correct for the sentences I wrote. But when should I use "across"? Would the sentence still be correct if I said

Japan has the biggest aquarium across the world?

1
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"In the world" or "across the world"?

I am confused when to use 'in' and 'across' when I am saying something like "This food is most expensive in the world" or "Japan has the biggest aquarium in the world."

I think "in the world" is correct for the sentences I wrote. But when should I use "across"? Would the sentence still be correct if I said "Japan has the biggest aquarium in the world"?