双语例句原声例句
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有几种化学物质取代了氧气。
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他展示了消防员的装备，包括氧气面罩，还鼓励听众把玩并试戴氧气面罩。
He displays fire fighters' equipment, including the oxygen mask, which he encourages his listeners to play with and put on.
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事实上，亚马逊雨林是“地球之肺”，因为它为地球供给了20%的氧气。
In fact, the Amazon Rainforest is the "lungs of our planet" because it produces 20% of the world's oxygen.
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That is metallic sodium that would keep in kerosene so it doesn't react with the oxygen in the air.
金属钠应该保存在没有中,这样它就不会和空气中的氧气反应了。
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