求翻译：单纯型（紫癜型）：皮肤紫癜为主要表现，呈对称分布，分批出现，高出皮肤表面，压之不褪色，反复发作于四肢及臀部，尤以双下肢伸侧为甚，少数累及面和躯干部。紫癜出现前可有皮肤瘙痒 。是什么意思？

Simplex (purpura type): skin purpura as the main performance, is symmetric, in batches, above the skin surface, the pressure of not fade, recurrent in the limbs and buttocks, extensor surfaces of both lower extremities especially staggering, involving a small number of surface and trunk. Before the

A simple type (bruise-type): skin bruise as the main performance in batches, and a petition, a symmetric distribution, high pressure on the surface of the skin, not faded, the recurring in 4 limbs and hips, particularly the legs stretched out side, a few tired and face-to-face and trunk. Before ther

Pure (purpura): The skin purpura is the main performance, assumes the symmetrical distribution, appears in turn, outdoes the skin surface, presses non-fading, manifests suddenly repeatedly in the four limbs and the buttocks, You Yishuang the lower limb extends the side for really, minority implicate

Simple (Purpura): skin Purpura as main manifestation, is a symmetrical distribution, appear in groups, up from the skin surface, does not fade, recurrent attacks on limbs and buttocks, especially lower-limb extensor side is very few involving the face and torso. Purpura occurs before pruritus.

Simple (Purpura): skin Purpura as main manifestation, is a symmetrical distribution, appear in groups, up from the skin surface, does not fade, recurrent attacks on limbs and buttocks, especially lower-limb extensor side is very few involving the face and torso. Purpura occurs before pruritus.