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1.The immune system is responsible for protecting thebody from foreign invaders.
免疫系统负责保护身体免受外来入侵者的伤害。
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2. The researcher found that the immune system can beinfluenced by certain environmental factors.
研究人员发现,免疫系统可能受到某些环境因素的影响。
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3. The patient's immune system was compromised dueto a severe infection.
由于严重的感染,患者的免疫系统受到了损害。