名词短语
中文翻译：Unknown
同义词：
['need', 'deficiency', 'shortfall', 'flaw', 'weakness']
例句：
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1. The company's sales have been weak due to the economic downturn.
由于经济衰退，该公司的销售一直疲软。
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2. The product has a weakness in its design that needs improvement.
该产品在设计上有缺陷，需要改进。
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3. The company's financial performance is weak due to high debt levels.
由于高债务水平，公司的财务状况疲软。