关键词：考研英语，长难句，每日一句，完整版
【考研英语长难句每日一句完整版】
今日长难句解析：
"Although the exact mechanisms by which stress affects the immune system are not fully understood, it is widely accepted that chronic stress can weaken the body's defense mechanisms, leading to an increased risk of infections and other health issues."
解析：
这句话是一个复合句，主句是“it is widely accepted that...”，其中“it”作为形式主语，真正的主语是后面的从句“that chronic stress can weaken the body's defense mechanisms, leading to an increased risk of infections and other health issues.”。从句中，“Although”引导让步状语从句，说明尽管压力影响免疫系统的具体机制尚不完全清楚，但普遍认为慢性压力会削弱身体的防御机制，从而导致感染和其他健康问题的风险增加。
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