millimeter mercury column

简明释义

毫米汞柱

英英释义

例句

1.The barometer showed a reading of 760 millimeter mercury column.

气压计显示的读数为760毫米汞柱。

2.The doctor checked my blood pressure and said it was 120 over 80 millimeter mercury column.

医生检查了我的血压，并说它是120对80毫米汞柱。

3.A normal atmospheric pressure at sea level is approximately 1013 millimeter mercury column.

海平面上的正常大气压力约为1013毫米汞柱。

4.In meteorology, atmospheric pressure is often measured in millimeter mercury column.

在气象学中，大气压力通常以毫米汞柱为单位进行测量。

5.When calibrating the pressure gauge, we used a standard millimeter mercury column for accuracy.

在校准压力表时，我们使用了标准的毫米汞柱以确保准确性。

作文

Understanding the concept of pressure is crucial in various scientific fields, particularly in physics and engineering. One common unit of pressure that often arises in these discussions is the measurement known as a millimeter mercury column. This unit, abbreviated as mmHg, has significant historical importance and practical applications in modern science. To fully grasp what a millimeter mercury column represents, we must delve into its origins, its uses, and its relevance in contemporary measurements.The millimeter mercury column originated from the need to measure atmospheric pressure, which is vital for understanding weather patterns, flight dynamics, and even human health. The term itself refers to the height of a column of mercury that can be supported by atmospheric pressure. At sea level, this height is approximately 760 mm, which establishes the standard atmospheric pressure. The use of mercury in barometers dates back centuries, and it became a reliable method for measuring pressure due to mercury's high density and low vapor pressure.In practical terms, the millimeter mercury column is used in various instruments such as barometers and manometers. Barometers, for instance, are essential tools for meteorologists who need to predict weather changes. By observing the height of the mercury column in a barometer, they can determine whether the atmospheric pressure is rising or falling, which indicates different weather conditions. Similarly, manometers utilize the millimeter mercury column to measure gas pressure in laboratory settings, helping scientists conduct experiments with precision.Moreover, the millimeter mercury column is not only limited to atmospheric pressure but also plays a critical role in the medical field. Blood pressure is commonly measured in mmHg, where systolic and diastolic pressures are recorded as two numbers separated by a slash. For example, a reading of 120/80 mmHg indicates normal blood pressure levels. This measurement is crucial for diagnosing hypertension and other cardiovascular conditions, making the millimeter mercury column an integral part of healthcare.Despite the advent of digital pressure sensors and alternative units of measurement, the millimeter mercury column remains widely used due to its simplicity and historical significance. Many countries still rely on mmHg for clinical and scientific purposes, highlighting its enduring legacy. Additionally, understanding how to convert between different units of pressure, such as pascals and atmospheres, often involves converting to or from mmHg, indicating the unit's continued relevance in global scientific discourse.In conclusion, the millimeter mercury column is more than just a unit of measurement; it is a bridge between historical practices and modern scientific applications. Whether in meteorology, medicine, or engineering, the ability to understand and utilize this measurement is essential. As we advance further into the realms of science and technology, the millimeter mercury column will undoubtedly continue to play a significant role in our understanding of pressure and its effects on the world around us.

理解压力的概念在各种科学领域中至关重要，特别是在物理学和工程学中。一个常见的压力单位是称为毫米汞柱的测量。这个单位缩写为mmHg，在历史上具有重要意义，并在现代科学中有实际应用。为了充分理解毫米汞柱所代表的内容，我们必须深入探讨其起源、用途及其在当代测量中的相关性。毫米汞柱源于测量大气压力的需要，这对理解天气模式、飞行动态甚至人类健康至关重要。这个术语本身指的是大气压力可以支撑的汞柱的高度。在海平面上，这个高度约为760毫米，这建立了标准大气压力。汞在气压计中的使用可以追溯到几个世纪前，由于汞的高密度和低蒸汽压，它成为测量压力的可靠方法。在实际应用中，毫米汞柱用于各种仪器，如气压计和压力计。例如，气压计是气象学家预测天气变化的基本工具。通过观察气压计中汞柱的高度，他们可以判断大气压力是上升还是下降，这表明不同的天气条件。同样，压力计利用毫米汞柱来测量实验室环境中的气体压力，帮助科学家精确地进行实验。此外，毫米汞柱不仅限于大气压力，在医学领域也发挥着关键作用。血压通常以mmHg为单位进行测量，其中收缩压和舒张压以斜杠分隔记录。例如，120/80 mmHg的读数表示正常的血压水平。这个测量对于诊断高血压和其他心血管疾病至关重要，使得毫米汞柱成为医疗保健的重要组成部分。尽管数字压力传感器和替代测量单位的出现，毫米汞柱仍然因其简单性和历史意义而被广泛使用。许多国家仍然依赖mmHg进行临床和科学目的，突显了它持久的遗产。此外，理解如何在不同的压力单位之间转换，例如帕斯卡和大气，通常涉及到与mmHg之间的转换，这表明该单位在全球科学讨论中的持续相关性。总之，毫米汞柱不仅仅是一个测量单位；它是历史实践与现代科学应用之间的桥梁。无论是在气象学、医学还是工程学中，理解和利用这一测量的能力都是必不可少的。随着我们进一步进入科学和技术的领域，毫米汞柱无疑将在我们理解压力及其对周围世界的影响方面继续发挥重要作用。