There is this specially adapted system of muscle and nerve tissue in the heart the sinoatrial ( SA) node, the atrioventricular node, and the Purkinje fibers which sets the rhythm of the heart.

AIM: To study the electrophysiological effects of diacetyl guan-fu base A ( DGFA) on pacemaker cells in sinoatrial ( SA) node.

目的：研究关附乙酯（DGFA）对窦房结起搏细胞电生理学的影响。

Methods Two Hodgkin-Huxley equations are used to simulate the potential of SA node and AV node, and to describe the regular pattern of cardiac rhythm.

方法利用两个Hodgkin-Huxley方程分别模拟窦房结和房室结的电位，综合描述心脏节律的规律。

The levels of noradrenaline ( NA) and acetylcholinesterase ( AChE) in the SA node region were determined with biochemical methods.

同时应用组织化学法结合图像分析、生化测定观测了窦房结区去甲肾上腺素（NA）及乙酰胆碱酯酶（AChE）的变化。

The electrical signal is generated through an influx of calcium into the cells in the SA node, causing a change in voltage which creates the current.

这个电信号是通过窦房结细胞的钙离子的内流产生的，它导致了膜电位的变化而由此产生了电流。

This is particularly important when the conducting tissues between the SA node and the ventricles fail only from time to time.

尤其在窦房结和心房之间的传导组织有时发生故障时这点尤为重要。

Objective: To certificate the curative effects of Sanzi Kechuan Capsule in treating chronic bronchitis with syndrome of phlegm-dampness accumulated in the lung, and evaluate objectively its safety.

目的：验证三子咳喘胶囊对慢性支气管炎（痰湿阻肺证）的疗效，并对其安全性作出客观评价。

To explore the therapeutic efficacy and its effect on the absorption of inflammatory material of Maqin Kechuan mistura in treating Asthma.

探讨麻芩咳喘合剂对哮喘治疗效果及炎性物质的影响。

Objective To explore clinical therapeutic effect of Kechuan Heji on chronic obstructive pulmonary disease ( COPD).

目的探讨咳喘合剂治疗慢性阻塞性肺疾病的临床疗效。

The tiny gas-rich state of Qatar has spent as much as$ 3bn over the past two years supporting the rebellion in Syria, far exceeding any other government, but is now being nudged aside by Saudi Arabia as the prime source of arms to rebels.

天然气资源丰富的小国卡塔尔过去两年支出多达30亿美元支持叙利亚反政府武装，远超其他任何国家的政府。但沙特阿拉伯正取而代之，成为叙利亚反政府武装首要的武器来源。

The Gulf state of Qatar this week said it has marketed some oil from rebel-held areas, and also managed to send badly-needed shipments of refined fuels to the rebel stronghold of Benghazi.

本星期海湾国家卡塔尔表示，他们已经开始帮助利比亚反对派出售石油，并向反对派控制的班加西运送了急需的石油制成品。

For instance, in the tiny Gulf state of Qatar, host of the 2022 World Cup, almost 1,000 people have died in construction related-accidents since January 2012.

例如，在卡塔尔（这个海湾小国将承办2022年世界杯），自从2012年1月份以来，已经有近1000人死于建设事故。

The top row captures elements of the different sub dimensions of the environment for ICT in the state of Qatar& market, political, and infrastructure.

最上面一行捕捉不同子元素对环境的尺寸在卡塔尔市场，政治，信息和通信技术基础设施的状况。

Pope Leo I maintained that Peter continues to speak to the whole church through the bishop of Rome, the first known such claim.

教宗利奥i坚持认为，彼得继续发言，整个教会通过罗马的主教，第一已知的此类索赔要求。

The only difference between our churches in their opinions of the certainty of their doctrines is, the Church of Rome is infallible, and the Church of England is never in the wrong.

他们的观点认为他们的教条是无误的，而且我们两教廷之间的唯一不同之处就在于：一个说罗马教廷是不会错的，另一个说英格兰教廷是不会错的。

He had been educated to regard the Church of Rome as the divine, infallible authority, and to accept with unquestioning reverence the established teachings and customs of a thousand years;

他所受的教育，曾令他相信罗马教会为神圣而绝无错误的权威，并以毫无疑问的敬畏，接受千古不变的教义和习惯；

So in1517 Luther rebelled against the Church of Rome, quite a number of things, one of them was his objections to the selling of indulgency.

1517年路德开始在很多方面反对罗马教会，其中一项就是反对出售赎罪券。

Darkness is often used to describe the Middle Age, during which the universities came into being and developed through the successive struggles against the Church of Rome and secular feudal lords.

提起中世纪，人们往往用黑暗来形容，可大学就在那个时代通过与罗马教会和世俗封建主的不懈斗争才形成并发展起来。

We both thought the best resource was flight, when pursued by so formidable an antagonist.

我们俩都认为被这么一位可怕的对手盯着, 三十六计走为上策.

Cedar Creek Treehouse is80 miles south of Seattle and is set50 feet up in a200-year-old western red cedar tree, right in the canopy of a lush temperate rainforest on the base of Mount Rainier.

树屋旅馆位于西雅图以南80英里处草木苍翠的雷尼尔山雨林中，建在50英尺高处的一棵200岁的红香柏树上。

Key Products: lumber-hemlock/ fir, western red cedar in a variety of grades from clear to# 3 grade.

主要产品：锯材，有铁杉/冷杉、崖柏，从净材级到级。