I have so many swollen and itchy mosquito bites.
我被蚊子咬了这么多包，又肿又痒。
They cause blood vessels to widen, resulting in the affected area of skin becoming red, swollen, itchy and painful, such as is seen in dermatitis or eczema.
他们导致血管扩张，使皮肤变为红色，肿起，痕痒和剌痛，譬如可见的皮炎或湿疹。
They cause blood vessels to widen, resulting in the affected area of skin becoming red, swollen, itchy and painful, such as is seen in dermatitis or eczema.
他们导致血管扩张，使皮肤变为红色，肿起，痕痒和剌痛，譬如可见的皮炎或湿疹。
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