Wasting food means losing not only life-supporting nutrition but also precious resources, including land, water and energy.

浪费食物不仅意味着失去维持生命的营养，还意味着失去宝贵的资源，包括土地、水和能源。

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Still, it's a drop in the bucket and the possibilities for other life-supporting bodies are endless.

只是，这不过是沧海一粟，其它可能支撑生命存活的星球仍是无止境的。

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Rainforests have been called the "lungs of the Earth," because they filter our air by absorbing CO2, while emitting life-supporting oxygen.

雨林被称为地球的“肺”，因为它们过滤空气吸收二氧化碳，而排放维持生命的氧气。

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Relatives wanted life-supporting treatment to be withdrawn, saying she would not want to live "a life dependent on others".

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The hunt for life-supporting planets has to be one of the most exciting, yet painfully difficult, of current scientific endeavors.

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Thus, this water source is important for meeting the needs of both humans and ecosystems, including the life-supporting services provided to humanity by the latter.

UNESCO: Summary