a pustule on sth
说明脓疱所在的身体部位时，常用介词 on。
A small pustule appeared on his cheek.
他的脸颊上出现了一个小脓疱。
脓疱；脓包
小疱；疱状突起；表皮或真皮内的小脓积聚。；皮肤上含有脓液的小炎症隆起；充满脓液的水疱。；充满脓液的小疱；脓疱。；植物或动物上类似脓疱的东西；小水疱。
A small, inflamed bump on the skin that contains pus, such as a pimple or boil.
表皮或真皮内的小脓积聚。
A small accumulation of pus in the epidermis or dermis.
皮肤上含有脓液的小炎症隆起；充满脓液的水疱。
a small inflamed elevation of skin containing pus; a blister filled with pus
充满脓液的小疱；脓疱。
A pimple filled with pus.
植物或动物上类似脓疱的东西；小水疱。
Anything like a pustule, on plants or animals; a small blister.
The doctor examined the red pustule on my arm and prescribed an antibiotic cream.
医生检查了我胳膊上那个红色的脓疱，并开了抗生素药膏。
用法提示：这里使用单数形式“pustule”，作为名词，指一个具体的脓疱。
Chickenpox typically causes clusters of pustules that itch intensely.
水痘通常会引起成片的剧烈瘙痒的脓疱。
用法提示：这里使用复数形式“pustules”，作为名词，指多个脓疱。
After a week of treatment, the pustules on his face began to dry up and heal.
经过一周的治疗，他脸上的脓疱开始干瘪愈合。
用法提示：这里使用复数形式“pustules”，作为名词，指面部多个脓疱。
说明脓疱所在的身体部位时，常用介词 on。
A small pustule appeared on his cheek.
他的脸颊上出现了一个小脓疱。
develop 表示逐渐长出脓疱，语气比 get 更正式。
She developed a painful pustule after the insect bite.
被虫咬后，她长出了一个疼痛的脓疱。
be covered with 表示某处皮肤上布满脓疱。
His back was covered with pustules.
他的背上布满了脓疱。
filled with pus 是过去分词短语，放在名词后作后置定语。
The pustules filled with pus were painful to touch.
那些充满脓液的脓疱一碰就疼。
grammar · medium
易错句子The doctor noticed several pustule on her arm.
正确表达The doctor noticed several pustules on her arm.
pustule 是可数名词，several 后必须用复数形式 pustules，不能保留单数。
grammar · medium
易错句子She has much pustules on her back.
正确表达She has many pustules on her back.
pustules 是可数复数，表示数量多要用 many，不能用修饰不可数名词的 much。
grammar · medium
易错句子The wound was full of pustule.
正确表达The wound was full of pus.
pustule 指含脓的小隆起，本身可数；表示伤口里的脓液应使用不可数名词 pus，而不是 pustule。
pustule 是医学用语，指表浅、明确含脓的小疱；pimple 更口语，多指青春痘或粉刺，常为红色小疙瘩，不一定含明显脓液。
blister 通常指摩擦、烫伤等引起、充满清亮液体的水疱；pustule 则专指含脓的小疱，多与感染有关。
boil 指较大、较深且疼痛的毛囊感染（疖子）；pustule 是表浅、肉眼可见的小脓疱，范围通常更小。
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