同样地，血液中的免疫系统细胞可以找到我们感染的部位，血液把废弃的副产品带到肾脏和肝脏被分解处理掉。
Likewise our immune system cells travel in the bloodstream, seeking out infection, and blood takes the body's waste products to the kidneys and liver to be sorted out and trashed.
据了解，烟能限制血液和养分到达耳内器官，为耳部感染铺平道路，并能对人体的免疫系统产生负面影响。
It's known that smoking can limit blood and nutrients from reaching vessels in the ears and can negatively affect the body's immune system, paving the way for ear infections.
如果沙门氏菌扩散到血液，可以导致婴幼儿，老年人以及免疫系统受损者(如aids和癌症患者)发生严重的疾病，以至死亡。
If it spreads to the blood, it can cause a severe illness that can kill the very young, the very old and those with damaged immune systems such as AIDS or cancer patients.
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