来自《耶鲁大学开放课程：1600年后西方社会的流行病 第6集 第6集》
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when fluid begins to accumulate in pockmarks,当流质开始在痘疮中聚集 -
which are then raised and firm to the touch--接着它们突起并且摸上去变硬 -
so we'll pass on--我们继续 -
now called vesicles.现在称为水泡 -
They've grown in size.它们变大 -
They've changed in color from red to bluish or purple.它们从红色变为近蓝色或是紫色 -
And they've transformed from solid它们从固体变为疱 -
to blister-like fluid.像流质一般 -
It's umbilicated as well.也是脐状的 -
The process of what's called vesiculation,这个过程就是水疱形成 -
the rise of this stage of the rash,疹的这个阶段的产生 -
takes about three days and需要花大约三天时间并且