The middle layer is the lamina propria and it contains blood and lymph vessels.

粘膜层的中层为固有层，内含血管和淋巴管。

The middle layer, the adipose capsule, is a fatty layer that protects the kidney from trauma.

中层为脂肪囊，这一脂肪层可保护肾免受创伤。

Step 2 Add loose sweaters, sweatshirts, vests, and pullovers for middle layers to hold in the heat.

添加宽松的羊毛衫，运动衫，背心和套头衫作为中间层，锁住热量。

The middle layer is Google's Ad Exchange, which matches buyers and sellers of advertising space (or " inventory" ).

中间层是谷歌的广告交易平台，它为广告位(或“库存”)的买家和卖家牵线搭桥。

A middle layer of nickel, which gives the bots magnetic polarity, so they can be pulled through wastewater with magnets.

中间的镍层提供磁极性，这样在磁力作用下机器人可以从废水中脱离。

Surrounding the tunica intima is the middle layer, the tunica media, made of smooth muscle cells and sheets of the protein elastin.

围绕内膜的是中间层，中膜，由平滑肌细胞和蛋白质弹性蛋白片组成。

Going down a little deeper, the wall's middle vascular layer contains the posterior choroid, a membrane that supplies all of the layers with blood.

再往下一点，壁的中间血管层包含后脉络膜，为所有层提供血液的膜。

The inner layer of the meninges is the pia mater, the middle layer is the arachnoid mater and the outer layer is the dura mater.

最内一层脑膜叫软脑膜，中间一层叫做蛛网膜，最外面一层叫硬脑膜。

The outer layer of the meninges is the dura mater, the middle layer is the arachnoid mater, and the inner layer is the pia mater.

脑膜的外层叫硬脑膜，中间层叫蛛网膜，内层则叫软脑膜。

The inner layer of the meninges is the pia mater; the middle layer is the arachnoid mater; and the outer layer is the dura mater.

最里面一层叫做软脑膜；中间一层叫做蛛网膜；最外面一层叫做硬脑膜。

So, moving from the outside of the heart to the inside of the heart: after the epicardium, there's the myocardium, which is the muscular middle layer.

从心脏的外侧到心脏的内部：在心外膜后，有心肌层，即中间的肌肉层。

In the anterior, there's also the ciliary body, a ring of muscle tissue that surrounds the lens; but the most famous part of this middle layer is the iris.

在前面，还有睫状体，环绕晶状体的一圈肌肉组织；但是这个中间层最著名的部分是虹膜。

That smooth muscle tissue is regulated in part by the nerve fibers of the autonomic nervous system, which can decrease the diameter of the lumen by contracting this middle layer during vasoconstriction, or expand it by relaxing during vasodilation.

平滑肌组织部分由自主神经系统的神经纤维调节，自主神经系统可以在血管收缩时通过收缩中间层来减小管腔直径，或者在血管舒张时通过放松来扩大管腔直径。