更原始固有的白细胞系统（例如中性粒细胞和巨噬细胞）形成了抵抗疾病的一线防御系统。
White blood cells of the more primitive innate system, like neutrophils and macrophages, form the first line of defense against disease.
更原始固有的白细胞系统（例如中性粒细胞和巨噬细胞）形成了抵抗疾病的一线防御系统。
White blood cells of the more primitive innate system, like neutrophils and macrophages, form the first line of defense against disease.
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