以下为句子列表：
英文: The key point is that the Gulf of Eilat is an oligotrophic sea, a sea that does not have nitrogen at all,Loya explained.
中文: 洛亚解释道：“关键是埃拉特海湾是一片营养贫乏、完全不含氮的海域。”
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英文: To study the biogeochemical cycle of phosphorus, it is very important to accurately determine the concentration of orthophosphates in the surface of oceans, especially oligotrophic open-oceans.
中文: 痕量活性磷分析是探索海洋，特别是寡营养海区生物地球化学过程的关键。
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