压力会削弱你的免疫系统。

Stress can weaken your ___immune ___system.

她的免疫系统因治疗而受到了损害。

Her ___immune ___system was compromised by the treatment.

研究的重点在于免疫系统如何对新型病毒作出反应。

Research is focused on how the ___immune ___system responds to novel viruses.