In the center layer (mesoderm) the heart and circulatory system are forming.

在中胚层，心脏和循环系统正在形成。

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One expanation is the failure of the electrical conductive system of the heart because of metabolic alterations….

一个解释是心脏的电路传导系统因为代谢改变而失效了......

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The heart of the CUE system is an 8-inch LCD touch screen that displays a home screen.

CUE系统的核心是一块8英寸的LCD触屏，作为系统的主屏幕。

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They may have a weak or damaged heart, high blood pressure or other problems of the blood system.

VOA: special.2010.07.27

The circulatory system which we'll talk about in a couple of weeks, the heart, the blood vessels, and the blood work together to form a totally internal function.

例如过几周我们要讲的循环系统,心脏,血管,血液,三者协同工作,形成一个完全在体内发挥作用的体系

耶鲁公开课 - 生物医学工程探索课程节选

As it does that it changes the volume of the heart and gives the - creates the pressure that moves blood around your body, so it has that muscular system.

这使心脏的体积发生变化,产生了足以使血液流遍全身的压力,这就是心脏中有肌肉系统的原因

耶鲁公开课 - 生物医学工程探索课程节选

The fatal flaw at the heart of the system is priority.

BBC: Viewpoint: Is it time to get rid of traffic lights?

My solution is to remove the fatal flaw at the heart of the system - the original sin of priority, because once you've removed priority you've removed the need for traffic lights and the need for speed because we're in no rush any more.

BBC: Viewpoint: Is it time to get rid of traffic lights?

Above all, the private firms at the heart of the financial system may have become too risk-averse to respond to rate-cut promptings.

ECONOMIST: First the put; then the cut?