以下为句子列表：
英文: Although helium is nontoxic and inert, it can act as a simple asphyxiant by displacing the oxygen in air to levels below that required to support life.
中文: 尽管氦无毒且不活泼，通过取代空气中的氧,使之下降到维持生命所必须的水平以下,它可以成为简单的窒息物。
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英文: Studies on the oxygen consumption rate and asphyxiant point of Dugesia Japonica
中文: 日本三角涡虫的耗氧率和窒息点
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