名词
中文翻译：Unknown
同义词：
['recovery', 'recovery process']
例句：
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1. The extraction of oil from the earthis a complex process.
从地球中提取石油是一个复杂的过程。
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2. The extraction of oilfrom the earth is a complex process.
从地球中提取石油是一个复杂的过程。
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3. Theextraction of oil from the earth is acomplex process.
从地球中提取石油是一个复杂的过程。