形容词
中文翻译：Unknown
同义词：
['preventive', 'preventative', 'precautionary']
例句：
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1. The doctor advised the patient to take a vitamin supplement as a preventive measure against heart disease.
医生建议病人服用维生素补充剂作为预防心脏病的措施。
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2. The company implemented a preventive system to reduce accidents in the workplace.
该公司实施了一个预防系统，以减少工作场所的事故。
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3. The policy is designed to prevent environmental pollution from reaching the oceans.
该政策旨在防止环境污染物进入海洋。