Intestinal mucosal immune system is the first line of defence that prevents animal body infection. It also is an important composition of whole animal body immune system.
肠道黏膜免疫是动物机体防止感染的第一防线，是整个动物机体免疫系统的重要组成部分。
Please give your ideas with inheritance, aggregation, composition and multiplicity of association for the whole scenario use of the system?
请给你的想法和继承，聚集，成分和为系统全部局面使用 结合的重复性。
The general composition of the sweep systems in analogue electron microscopes was introduced, then the operation principle for the whole system and all the related circuits was discussed.
本文介绍模拟式电子显微镜扫描系统的基本组成，对系统整体和各单元电路的工作原理进行了分析。
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