international system of units

简明释义

国际单位制

英英释义

例句

1.The international system of units 国际单位制 includes units like meters, kilograms, and seconds.

国际单位制 国际单位制包括米、千克和秒等单位。

2.The scientist conducted the experiment using the international system of units 国际单位制 to ensure accuracy.

科学家在实验中使用了国际单位制 国际单位制以确保准确性。

3.In engineering, measurements are typically taken in the international system of units 国际单位制 to maintain standardization.

在工程中，测量通常采用国际单位制 国际单位制以保持标准化。

4.When converting measurements, it's important to use the international system of units 国际单位制 for consistency.

在转换测量时，使用国际单位制 国际单位制以保持一致性非常重要。

5.The international system of units 国际单位制 is essential for scientific communication worldwide.

为了全球科学交流，国际单位制 国际单位制是必不可少的。

作文

The international system of units is a standardized system of measurement that is essential for scientific communication and understanding. It was established to provide a consistent framework for measuring various physical quantities, including length, mass, time, electric current, temperature, amount of substance, and luminous intensity. The need for such a system arose from the complexities and inconsistencies of traditional measurement units that varied from one region to another. By adopting the international system of units (SI), scientists and researchers can ensure that their findings are accurately communicated and understood across different disciplines and countries.One of the key features of the international system of units is its reliance on base units. There are seven base units in the SI system: meter (m) for length, kilogram (kg) for mass, second (s) for time, ampere (A) for electric current, kelvin (K) for temperature, mole (mol) for the amount of substance, and candela (cd) for luminous intensity. These units are defined by universally accepted standards, which eliminates ambiguity and fosters clarity in scientific discourse. For example, a meter is defined based on the distance light travels in a vacuum in 1/299,792,458 seconds, providing an objective reference that can be replicated anywhere in the world.In addition to the base units, the international system of units also includes derived units, which are combinations of the base units. For instance, the unit of force, known as the newton (N), is derived from the base units of mass, length, and time, represented as kg·m/s². This systematic approach to unit derivation allows for a wide range of measurements to be expressed in a coherent manner, facilitating calculations and comparisons across various scientific fields.The adoption of the international system of units is not limited to scientific research; it has practical implications in everyday life as well. For instance, when purchasing groceries, consumers expect weight to be measured in kilograms rather than pounds, and distances to be measured in meters rather than feet. This uniformity aids in reducing confusion and ensures that people can easily understand and interpret measurements regardless of their background.Moreover, the international system of units plays a crucial role in international trade and commerce. Businesses operating in a global marketplace must adhere to SI units to ensure that products meet international standards and regulations. For example, automotive manufacturers must comply with specifications that are often defined using SI units, ensuring that vehicles are safe and efficient for consumers worldwide.Despite its widespread use, the international system of units continues to evolve. Advances in technology and science lead to refinements in how units are defined and measured. For instance, in 2019, the definitions of the kilogram, ampere, kelvin, and mole were redefined based on fundamental constants of nature, such as the Planck constant. This shift represents a significant milestone in metrology, ensuring that the SI system remains relevant and precise in an ever-changing scientific landscape.In conclusion, the international system of units is an indispensable tool for fostering clear communication and understanding in science, commerce, and daily life. Its standardization of measurements not only enhances the accuracy of scientific research but also simplifies interactions in our increasingly interconnected world. As we continue to innovate and explore new frontiers, the importance of the SI system will undoubtedly grow, underpinning our efforts to share knowledge and collaborate effectively across borders.

国际单位制是一个标准化的测量系统，对于科学交流和理解至关重要。它的建立旨在提供一个一致的框架，用于测量各种物理量，包括长度、质量、时间、电流、温度、物质的量和光强度。这样的系统需求源于传统测量单位的复杂性和不一致性，这些单位在不同地区之间有所不同。通过采用国际单位制（SI），科学家和研究人员可以确保他们的发现能够准确地传达和理解，跨越不同学科和国家。国际单位制的一个关键特征是其对基本单位的依赖。SI系统中有七个基本单位：米（m）用于长度，千克（kg）用于质量，秒（s）用于时间，安培（A）用于电流，开尔文（K）用于温度，摩尔（mol）用于物质的量，坎德拉（cd）用于光强度。这些单位由普遍接受的标准定义，消除了歧义，促进了科学讨论的清晰性。例如，米的定义是基于光在真空中以299,792,458分之一秒的时间所走的距离，提供了一个客观的参考，可以在世界任何地方复制。除了基本单位，国际单位制还包括派生单位，这些单位是基本单位的组合。例如，力的单位称为牛顿（N），它是由质量、长度和时间的基本单位派生而来的，表示为kg·m/s²。这种系统化的单位派生方法使得广泛范围的测量能够以一致的方式表达，便于在各个科学领域之间进行计算和比较。国际单位制的采用不仅限于科学研究；它在日常生活中也具有实际意义。例如，当购买杂货时，消费者希望重量以千克而不是磅来衡量，距离以米而不是英尺来衡量。这种统一性有助于减少混淆，并确保人们无论背景如何都能轻松理解和解释测量。此外，国际单位制在国际贸易和商业中发挥着至关重要的作用。在全球市场中运营的企业必须遵循SI单位，以确保产品符合国际标准和法规。例如，汽车制造商必须遵守通常使用SI单位定义的规格，确保车辆对全球消费者安全和高效。尽管被广泛使用，国际单位制仍在不断发展。科技和科学的进步导致单位定义和测量方式的改进。例如，在2019年，千克、安培、开尔文和摩尔的定义基于自然的基本常数，如普朗克常数进行了重新定义。这一转变标志着计量学的一个重要里程碑，确保SI系统在快速变化的科学环境中保持相关性和精确性。总之，国际单位制是促进科学、商业和日常生活中清晰沟通和理解的重要工具。它对测量的标准化不仅增强了科学研究的准确性，还简化了我们日益互联的世界中的互动。随着我们继续创新和探索新的前沿，SI系统的重要性无疑将会增加，支撑着我们跨越国界分享知识和有效合作的努力。