摘要：Air is all around us.We can’t live without air.It’s the most important thing to living things in the world.When we stand up,it’s around us.When we sit down,it’s around us,and when we sleep,it’s also around us.It’s around us all the time.We can live without food or drinks for a few days.But we can’t live without air for a few minutes.Now do you think the air is the most important thing in the world?If there is no air,there is also no life.

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