Problems arise when the body’s immune system is not functioning adequately.

免疫系统不能充分发挥作用时，身体就会出现问题。

No one knows why a fetus is not automatically rejected by the mother’s immune system.

没有人知道为什么母亲免疫系统不会自动排斥胎儿。

Neopterin is a marker for the activation of the cell-mediated immune system,the elevation of its serum concentration is an independent predictor of cardiovascular adverse events.

而新蝶作为一种细胞介导免疫激活敏感标志物,其血清水平升高是心血管不良事件独立预测指标。

In addition, only certain murine mAb isotypes hae been shown to effectiely bind to and actiate elements of the human immune system, thereby triggering cytotoxic effector functions10.

另外，只有某些亚型抗可以有效结合并激活人免疫系统，以激发细胞毒作用[10]。