Deep sleep and exercise de-stress the body and boost the immune system's germ-fighting cells.
熟睡和锻炼可以缓解身体的压力并且促进免疫系统的病菌战斗细胞。
You have a middle ear infection when germs get into the middle ear and the area fills up with fluid (or pus), which contains germ-fighting cells.
当微生物进入中耳引起感染,小气袋里就会因此充满脓液,这些脓液里包含了抗菌细胞。
Scientists have long known that the skin of frogs contains plenty of powerful germ-fighting substances because of the hostileenvironments they exist in.
科学家很久以前就知道,由于生存环境恶劣,青蛙的皮肤中含有大量能够对抗微生物的物质。
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