... maturation lag 成熟落后 maturation hypothesis 成熟假说 organic maturation 有机质成熟作用 ...
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The hygiene hypothesis states that modern hygiene measures have led to a lack of exposure to infectious agents, which is important for the normal maturation of the immune system.
卫生假说认为，现代的卫生措施，导致了接触传染性病原体的缺乏，这对免疫系统的正常发育是重要的。
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