名词
中文翻译：Unknown
同义词：
['descending belt', 'descending zone', 'descending region']
例句：
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1. The scientistsdiscovered a descending tracts of the ocean floor.
科学家们发现了海洋底部的一个下降地带。
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2. The team carefully studied the descending tracts in the area.
团队仔细研究了该地区的下降地带。
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3.The researchers found that the descending tracts were responsible for the change in temperature.
研究人员发现下降地带是温度变化的原因。