人体对疾病具有先天性防御机制。
The body has natural defence mechanisms to protect it from disease.
因此，国家和区域动物疾病监视系统不仅需要预防畜牧生产遭受损失，而且需要减轻对人体健康的威胁。
Hence there is the need for national and regional animal disease surveillance systems to prevent not only losses to livestock production, but to reduce threats to human health as well.
饮食补剂标签会明示该补剂对人体构造或功能有何种影响，但不会宣称该补剂能够治疗甚至治好疾病。
Dietary supplement labels can make claims about how the dietary supplement may affect the structure or the function of the body, but not claims to treat or cure a disease.
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