形容词
中文翻译：有害的
同义词：
['contagious', 'infective', 'infectious', 'pathogenic']
例句：
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1. Thedisease is known to be highly contagious.
这种疾病已知具有高度传染性。
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2.The bacteria are known to be infective to humans.
这种细菌已知对人类具有传染性。
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3.The virus is known to be infectious and can cause serious illnesses.
这种病毒已知具有传染性，并能引起严重的疾病。