形容词
中文翻译：有害的
同义词：
['harmful', 'poisonous', 'detrimental', 'deleterious']
例句：
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1. Theair pollution is pernicious to the health of the people.
空气污染对人们的健康有害。
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2. The chemicals used in this process are pernicious to the environment.
这种过程中使用的化学物质对环境有害。
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3. The disease is pernicious and can be transmitted from one person to another.
这种疾病有害，可以从一个人传播到另一个人。