名词短语
中文翻译：煤炭洗选和加工
同义词：
['coal preparation', "coal processing例句：1. The company's main business is coal washing and dressing.（该公司的主要业务是煤炭洗选和加工。）"]
例句：
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1. The company's main business is coal washing and dressing.
该公司的主要业务是煤炭洗选和加工。
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2.Coal washing and dressing are essential for the production of steel.
煤炭洗选和加工对于钢铁生产至关重要。
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3. The coal washing and dressing process is complex and requires skilled labor.
煤炭洗选和加工过程复杂，需要熟练的劳动力。