The preservation of this cultural heritage is our responsibility.

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I go to the supermarket every day to buy fresh food.

This food is preserved in a vacuum.

This experiment is conducted in a vacuum.

I'm worried about his health condition.

Retort food is very convenient and has a long shelf life.

This old radio uses a vacuum tube.

This cheese is vacuum packed and can be stored for a long time.

I am preserving food in a vacuum pack.