The rail system, an artery for the American economy here.

铁路系统是美国经济的。

Today, I'm announcing the United States is targeting the main artery of Russia's economy.

今天，我宣布美国正瞄准俄罗斯经济的。

The aortic I may rely upon, but I should value your opinion upon the mitral.

我的还好，可是对于我的僧帽瓣，我要听听您的宝贵的意见。

With her aortic injuries, her chances of survival are extremely slim no matter what we do.

不管我们怎么做，她的伤使她的生还几率比较渺茫。

When the elastic fibers around the aorta weaken, they can't provide the artery with enough support.

当周围的弹性纤维变弱时，它们就不能提供足够的支撑。

The researchers found that the large arteries in the body became stiffer and less elastic with age, causing increased blood pressure.

研究者们发现人体内的血管随着年龄增长而逐渐僵硬缺少弹性，从而导致血压上升。

The " great arteries" , are these two main arteries taking blood away from the heart —the aorta and pulmonary artery.

指的就是这两条把血液带离心脏的主要：主和肺。

If these two great arteries, the aorta and pulmonary artery, don't divide, you essentially have this massive artery coming from both ventricles.

如果主和肺这两条不分开的话，你就会有这条从心室发出的。

These chemoreceptors are located in our brains and some large arteries that deliver blood to the brain.

这些化学感受器位于我们的脑和一些向脑输送血液的中。

We only exist as the blood corpuscles that course through its arteries, and if it could work without us, it would let us die.

我们存在着，只不过像流过它的的一些血球，要是它没有我们也能工作的话，它就会让我们死掉。

Most neural responses like this use baroreceptors, special nerve endings found in the carotid arteries, the aorta, and other larger arteries in the neck.

多数像这样的神经反应使用压力感受器，在颈、主和颈部的其他中发现的特殊神经末梢。

However, other veins are located deep within your body, and these deep veins tend to follow the course of the major arteries.

然而，其他静位于身体的深处，这些深静往往跟随的走向。

But do I desire unreasonably much in wanting what is called life—music, poetry, passion, war, and all the beating and pulsing that are going on in the great arteries of the world?

但我需要所谓的生活——音乐、诗歌、热情、战争以及世界里的种种跳和搏，难道说这样太无理太过分了吗？

And two, the ventricles need to squeeze like their squeezing a tube of toothpaste -- from the bottom up -- to accelerate the blood through the big arteries at the top of the heart.

第二，心室需要挤压，就像挤压一管牙膏一样——自下而上——来加速血液通过心脏顶部的。

When this right ventricle contracts, it forces the pulmonary semilunar valve to open, allowing a rush of blood into the pulmonary trunk, which is the large artery that leaves the right ventricle.

右心室收缩时，它会迫使肺半月瓣打开，从而使血液涌入肺，后者是离开右心室的。

At the first large crosstown artery of travel he took an eastbound car that deposited him in a decaying avenue, whose ancient structures once sheltered the pride and glory of the town.

在第一条横贯城市的上， 他乘坐了一辆向东行驶的汽车， 将他停在一条破旧的街上，这条古老的建筑曾经庇护着这座城镇的骄傲和荣耀。

Eventually the whale would tire, the men would be able to approach it, and they would cut open a main artery, and a huge fountain of blood would pour out, covering the men on the boat.

最终鲸鱼会筋疲力尽， 人们就能靠近它，然后他们会割开一条，量的血液会喷涌而出，淋满船上的所有人。