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

铁路系统是美国经济的大动脉。

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的大动脉。

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

我的大动脉还好，可是对于我的，我要听听您的宝贵的意见。

Five rail lines link the East and West Coast.

五条铁路大动脉连接起了东西两岸。

Fighting flared again in Eastern Ukraine as Russian-backed separatists attacked an important railway hub.

乌克兰东又掀战火，俄罗斯所支持的分裂主义者袭击了铁路大动脉。

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大动脉血管随着龄增长而逐渐僵硬缺少弹性，从而导致血压上升。

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、战争以及世界大动脉里的种种跳动和搏动，难道说这样太无理太过分了吗？

If one of the Allosaurus can get to the soft skin of the neck, they might be able to sever a major artery or cut off the air to the lungs.

如果一头异特龙能咬到其颈软的皮肤，就有可能切断大动脉或者切开气管让其无法呼吸。

Yeah, if there's one thing fast food workers konw how to do, it's clog major artery.Yeah, that's good.That's all I needed.

快餐业工人最会 就是阻碍大动脉了 嗯 可以了 我就需要这些。

It was a lucky shot (or unlucky, depending on your point of view, I guess) , hitting the portal vein and killing her.

她很幸运（也许你会说不幸，视你的观点而定），击中了大动脉导致死亡。

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，只不过像流过它的大动脉的一些血球，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.

大多数像这样的神经反应使用压力感受器，在颈动脉、主动脉和颈的其他大动脉中发现的特殊神经末梢。

So transposition of the great arteries, or TGA —you might be able to guess— is when these two arteries swap locations.

所以大动脉转位（TGA），顾名思义，就是指这两个动脉交换了位置。

I was hoping that it didn't hit. But from that angle, it just can't have missed the aorta.

我不希望这样的事情发生，但从这个角度来看，我们不能忽视大动脉。

Notice though, that this one big artery does split into the aorta and pulmonary artery.

注意，这条大动脉确实会分成主动脉和肺动脉。

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

不管我们怎么做，她的大动脉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.

当大动脉周围的弹性纤维变弱时，它们就不能为动脉提供足够的支撑。

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的大动脉。

Less commonly, babies can have levo-transposition of the great arteries, or l-TGA, with levo meaning that the aorta's primarily to the " left" of the pulmonary artery.

更少见地，宝宝可能会有左旋-大动脉转位，即L-TGA，左旋的意思是主动脉主要位于肺动脉的左侧。

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的话，你就会有这条从心室发出的大动脉。