a reaction by a living thing against attacks by enemies or diseases The immune system is the body's major defence mechanism. 免疫系统是人体的主要防御机制。 Plants have complex defence mechanisms, both chemical and electrical. 植物具有复杂的化学和电气防御机制。
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psychology 心理 a way in which somebody behaves without thinking about it to protect themselves from unpleasant feelings or situations He uses humour as a defence mechanism. 他使用幽默作为防御机制。 Buying expensive things despite poverty is often a defence mechanism. 尽管贫穷，但购买昂贵的东西通常是一种防御机制。