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The rash morphology progresses from papules to pustules and finally to crusting lesions .

皮疹的形态从最初的丘疹发展至脓疱，最终局部脱屑。

Whiletesting a new variety 's resistance , he was alarmed to find stems scarred not bythe yellow streaks of stripe rust but the angry pustules of stem rust .

当他测试一个新品种的抗性时，他震惊的发现植物茎杆上的伤疤不是条纹锈病的黄色条纹，而是茎杆锈病的发炎脓包。

Its most devastating form ( puccinia graminis ) attacks the plant 's stem , forming lethal , scaly red pustules .

其最为严重的破坏方式（小麦锈菌）是袭击植物的茎，形成导致植株死亡的鳞片状红色脓疱。

For instance , stress may somehow stimulate the growth of nerve fibers near sebaceous glands , which in turn contributes to the increased production of sebum - the fatty substance that combines with cell debris and dead skin cells to form those familiar blackheads and pustules .

比如，压力也许以某种方式刺激了皮脂腺附近神经纤维的生长，反过来有助于增加皮脂融合了细胞碎片和死皮细胞的脂肪物质，形成那些我们熟悉的黑头和脓包。