名词短语
中文翻译：可接受的投诉
同义词：
['reasonable complaint', 'acceptable grievance']
例句：
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1.The company's response to the customer's justifiable complaint was prompt and helpful.
公司对顾客的合理投诉的回应是迅速且有帮助的。
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2.The manager listened patiently to the employee's justifiable complaint about the workload.
经理耐心地听取了员工关于工作量合理的抱怨。
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3. The police officer handled the justifiable complaint with professionalism and respect.
警察官员以专业和尊重的态度处理了合理的投诉。