在脊椎动物中，免疫系统提供了对体内寄生虫的多重防御。
In vertebrates, the immune system provides a multiple defense against internal parasites.
本文重点介绍“整体防御、综合治理、多重保护”的防范原则，力争将其产生的危害降低到最低点。
This article focuses on the "overall defense in a comprehensive way, multiple protection" of the precautionary principle, strive to reduce the harm to the lowest point.
系统设计合理、运行可靠，提高了生产的智能化水平，很多重要防御场所均适用。
System is well designed, reliable, and increase the production level of intelligence, are applicable to many important defense establishments.
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