由皮的

"The leather saddle was developed between the 3rd century BC and the 1st century AD, probably by peoples of the Asian steppes, where the stirrup and the horse collar also originated."

皮鞍发展于公元前3世纪至公元1世纪，大概是由亚洲大草原的民族最先使用，马镫及马颈圈也发源于此。

Methods The clinical and histopathologic symptoms of two patients with sarcomatoid carcinoma of the bladder were macrohematuria and vesical irritability. Cystoscopy showed the carcinoma was solid tumor with necrotic tissue on the surface. Sarcomatoid carcinoma was mainly composed of transitional epithelial cancer cells and malignant mesenchymal cells (spindle cells and polymorphic cells), with a transitional region of interlacement of these cells. Immunohistochemical testing showed the cells were positive for cytokeratin, c arcinoembryonic antigen and smooth muscle actin.

分析2例膀胱肉瘤样癌患者的临床资料并结合文献进行讨论。2例患者均有肉眼血尿或伴有膀胱刺激症，膀胱镜检查为实体瘤，表面有坏死组织；病理表现，肿瘤主要由移行上皮癌细胞和恶性间叶细胞组成，之间可见移行过渡；免疫组化CK、CEA、SMA。

The two sponges get marks of 0 in acute eye stimulation test and intracutaneous stimulation test , thus they are not stimulating to tissues.

由不同原料制备的FGF/胶原蛋白复合海绵，分别进行以下生物学测试；(1)皮内刺激试验；(2)短期肌肉植入试验，实验数据根据标准进行分析和评估。

The traveller wore a coarse jerkin fastened round his body by a leathern girdle, and over it a short cloak, composed of equally plain materials.

旅客身穿粗jerkin系上一轮他的身体由一个皮腰带，而超过一个短斗篷，组成同样平原材料。

"This ice lolly is covered with a crispy chocolate layer."

"这支雪条是由一层脆皮朱古力覆盖着的。"

Heregulin-αwas a cytokine which was synthesized and secreted by mammary mesenchyme,adjacent to lobuloaveolar structures.

Heregulin-α是主要由乳腺间质细胞合成和分泌的细胞因子，作用于乳腺导管和腺泡上皮细胞。

Much of the area is made up of mudstone on the Moenkopi Formation, which is about 240 million years old.

大部分地区是由泥岩地层的莫恩科皮，这是约240万年。

In fact, itching in the scrotum are quite common in young men, because the perineal skin by soaking sweat, friction, such as underwear, or lack of vitamins because the body B2, caused by the fungal inflammation of the scrotum, as well as the site of emergence of the scrotum neurodermatitis, eczema, etc.

其实，阴囊瘙痒在男青年中相当常见，因为阴部皮肤受到汗液浸渍、内裤摩擦等影响，或者因体内缺乏维生素B2、由真菌引起的阴囊炎，以及阴囊部位出现神经性皮炎、湿疹等，都可能导致这种状况。

The whole is surrounded by a testa developed from the integuments of the ovule.

整个种子被由珠被发育成的种皮包裹。

Periderm was composed by Cork, cork cambium, and phelloderm.

结果表明，格木根的次生结构由周皮和维管组织构成。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！