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

铁路系统是美国经济的大。

Five rail lines link the East and West Coast.

五铁路大连接起了东西两岸。

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。

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

注，大确实会分成主和肺。

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

不管我们怎么做，她的大伤使她的生还几率比较渺茫。

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

我的大还，可是对于我的僧帽瓣，我要听听您的宝贵的见。

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

乌克兰东部又掀战火，俄罗斯所支持的分裂主义者袭击了铁路大。

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

当大围的弹性纤维变弱时，它们就不能为提供足够的支撑。

So, over time, the aorta begins to enlarge — so much so that it can rupture.

所以，随着时间的推移，大开始膨胀——大到可以破裂。

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

我不希望样的事情发生，但从个角度来看，我们不能忽视大。

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

如果主和肺两大不分开的话，你就会有从心室发出的大。

I'm holding on to a major artery here.

我正盯着一根大。

I'm gonna have to enlarge the incisionto get to the aorta.

我得扩大切口 要到大。

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

所以大转位（TGA），顾名思义，就是指两个交换了位置。

Japan's capital is not a city of grand arterial boulevards.

日本的首都不是一个拥有大林荫大道的城市。

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 就是阻碍大了 嗯 可以了 我就需要些。

I did a pre-op echo. His aorta valve is leaking.

术前超声波显示大出现泄漏。

I have an abdominal aortic aneurism, okay?

我腹部大上有一个肿瘤 满了吧？

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

大指的就是两把血液带离心脏的主要：主和肺。

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。