名词
中文翻译：免疫防御
同义词：
['immunity', 'defense against disease']
例句：
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1.The immune system is responsible for protecting the body from harmful substances.
免疫系统负责保护身体免受有害物质侵害。
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2. The vaccine is designed to provide immunity against a particular disease.
疫苗旨在提供对该特定疾病的免疫力。
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3.Infection is the process by which a virus or bacteria invades and infects the body's cells.
感染是病毒或细菌侵入并感染人体细胞的过程。