并且所有这些都会激发寄主的免疫系统，从其它地方占用资源。
And all provoke the host's immune system into activity, which diverts resources from other things.
被选中的寄主细胞是一种被叫做T细胞的免疫系统细胞，具体而言，他们是辅助T细胞[注一]，它将应答免疫系统对例如病毒等病原体的反应。
The host cells in question are immune-system cells called T-cells. Specifically, they are "helper" T-cells, which orchestrate the immune system's response to pathogens such as viruses.
植物防卫信号的产生类似于动物免疫系统因子的介导，并可由非寄主病原菌或诱导子诱发。
Plant defense signal uses the similar mechanism in the animal immunity system, and it can be initiated by non-parasitic pathogen and mediator.
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