They consume carbon dioxide, and release oxygen.
它们消耗二氧化碳，并释放氧气。
Trees can absorb carbon dioxide and release oxygen.
树木可以吸收二氧化碳和释放氧气。
They absorb harmful gases and release oxygen so that you can have clean air.
他们吸收有害气体，并释放氧气，这样您可以有干净的空气。
Cells need the oxygen in air to break down foods and release energy.
细胞需要空气中的氧来分解食物，释放能量。
Cells need the oxygen in air to break down foods and release energy.
细胞需要空气中的氧来分解食物，释放能量。
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