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。
The ear reacts by making pus, a thick liquid that fights bacteria. As the pus builds up it pushes on the eardrum, causing pain.
耳朵对此的反应就是化脓，既一种浓浓的抵抗细菌的液体，当脓水产生并推向耳膜，引起疼痛。
There is also more likely to be pus or fluid coming out of the ear.
也有更容易被脓或液体走出来的耳朵。
There is also more likely to be pus or fluid coming out of the ear.
也有更容易被脓或液体走出来的耳朵。
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