If someone is in a car driving on a road outside a city in direction away from it, can you then say that she´s leaving the city behind even if she´s going to return later that day? Because when I hear leave behind, I think of someone who´s leaving something for good and won´t return.
You can, but as you point out, it has the air of finality. Here's another example: He left his umbrella behind. When it starts to rain, he will come back and retrieve it.
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You can, but as you point out, it has the air of finality.
Here's another example:
He left his umbrella behind. When it starts to rain, he will come back and retrieve it.