neutrophilic chemotactic factor

例句：

1. 1. The patient's blood showed a high level of neutrophils, indicating an infection.
   患者的血液显示中性粒细胞水平高，表明有感染。
2. 2.The study found that the neutrophil-rich environment can enhance the immune system's response to infections.
   研究发现，富含中性粒细胞的环境可以增强免疫系统对感染的反应。
3. 3.Neutrophils play a crucial role in fighting off infections by engulfing and destroying pathogens.
   中性粒细胞通过吞噬并摧毁病原体来在抵抗感染中发挥关键作用。