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

铁路系统是美国经济大动脉。

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大动脉。

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

我大动脉还好，可是对于我僧帽瓣，我要听听您宝贵意见。

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

不管我们怎么做，大动脉伤使还几率比较渺茫。

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

当大动脉周围弹纤维变弱时，它们就不能为动脉提供足够撑。

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大动脉血管随着年龄增长逐渐僵硬缺少弹，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.

大动脉指就是这两条把血液带离心脏主要动脉：主动脉和肺动脉。

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

如果主动脉和肺动脉这两条大动脉不分开话，你就会有这条心室发出大动脉。

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大脑和一些向大脑输送血液大动脉中。

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，只不过像流过它大动脉一些血球，要是它没有我们也能工作话，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.

大多数像这样神经反应使用压力感受器，在颈动脉、主动脉和颈部其他大动脉中发现特殊神经末梢。

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

然，其他静脉位于身体深处，这些深静脉往往跟随大动脉走向。

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?

但我需要所谓活——音乐、诗歌、热情、战争以及世界大动脉里种种跳动和搏动，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——自下上——来加速血液通过心脏顶部大动脉。

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，使血液涌入肺动脉，后者是离开右心室大动脉。

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.

在第一条横贯城市大动脉上， 他乘坐了一辆向东行驶汽车， 将他停在一条破旧大街上，这条古老建筑曾经庇护着这座城镇骄傲和荣耀。