形容词
中文翻译：粗的
同义词：
['raw', 'unrefined', 'primitive']
例句：
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1. The crude oil is extracted from the ground.
原油是从地下提取的。
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2. The raw materials are used to make the product.
原材料被用来制造产品。
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3. The primitive tribe lived in caves for thousands of years.
原始部落几千年来一直生活在洞穴里。