Though we cannot see it, there is air all around US.
虽然我们看不见空气，但我们的周围处处都是空气。
There is air all around us, but we can' t see it.
虽然我们周围没有空气，但我们却看不见。
Although we cannot see it, there is air all around us.
尽管我们看不到空气，但我们周围到处都是空气。
Although we can't see it, there is air all around us.
虽然我们看不见空气，但在我们周围都有空气。
Although we can't see it, there is air all around us.
虽然我们看不见空气，但在我们周围都有空气。
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