常見例句雙語例句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.衛(wèi)生假說認爲，現代的衛(wèi)生措施，導致了接觸傳染性病原躰的缺乏，這對免疫系統(tǒng)的正常發(fā)育是重要的。 返回 maturation hypothesis