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细菌以这种油为食，并释放硫化氢气体。
Bacteria feed on this oil and release hydrogen sulfide gas.
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氧气和氢气从电解水中被释放出来。
Water is said to consist of oxygen and hydrogen.
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这种金属作用于水，就释放了氢气。
This metal acts on water to set hydrogen free.
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氧气和氢气从电解水中被释放出来。
Oxygen unites with hydrogen to form water.
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氧气和氢气从电解水中被释放出来。
Oxygen unites with hydrogen to form water.
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