名词
中文翻译：底板
同义词：
['base', 'foundation']
例句：
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1.The subplate of the earth is about 30 km thick.
地球的底层大约厚30公里。
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2. The subplate beneath the ocean floor is constantly being uplifted by the movement of tectonic plates.
海洋底部的底层正被地壳板块的运动不断抬升。
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3. The subplate boundary between the North American and Eurasian plates is responsible for many earthquakes in the region.
北美板块与欧亚板块之间的边界是该地区许多地震的原因。