系统内的空气可能妨碍水的正常循环，可能导致运行噪声发生。

Air in the system can prevent proper circulation of water and may cause noisy operation.

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水，到处是水：爱德华·丽纳克尔与他的Airdrop灌溉系统，这个系统甚至能在最干旱的地区从空气中获得水汽，可以为植物提供水。

Water, water everywhere: Edward Linacre with his Airdrop irrigation system, which can harvest moisture from the air in the driest regions and provide water for crops.

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由于压缩过程影响空气的露点，压缩空气在管线中运行时温度会逐渐降低，所以压缩空气系统中总是有液体水存在。

Due to compression process influence the air dew point of compressed air in the pipeline, run it will gradually decrease temperature, so the compressed air system always have liquid water.

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