身体免疫系统和心理免疫系统的区别在于我们只了解前者。
The difference between our physical and psychological immune systems is that we know all about the physical.
他说“让孩子拥有两只狗和一只猫”会更有帮助，这会使他们染上肠道寄生虫，以便促进一个健康的免疫系统。
Also helpful, he said, is to "let kids have two dogs and a cat," which will expose them to intestinal worms that can promote a healthy immune system.
TNS是一种最终导致免疫系统缺乏的疾病，不同犬只的临床症状也不同。
TNS is a disease which ultimately causes a deficiency of the immune system, so symptoms can vary between pups.
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