Because of the moral hazard, the service quality of the travel industry is very low.
道德风险问题导致旅行社质量供给不足。
The invention has simple devices and low operation cost, and has no potential safety hazard.
本发明方法设备简单，运行成本低，不存在安全隐患。
The invention has simple devices and low operation cost, and has no potential safety hazard.
本发明方法设备简单，运行成本低，不存在安全隐患。
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