international system of units (SI)

简明释义

国际通用单位

英英释义

例句

1.In science classes, we often learn to use the international system of units (SI) 国际单位制 for measurements.

在科学课上，我们经常学习使用国际单位制 国际单位制进行测量。

2.The international system of units (SI) 国际单位制 is essential for ensuring consistency in scientific research.

为了确保科学研究的一致性，国际单位制 国际单位制是必不可少的。

3.Engineers must adhere to the international system of units (SI) 国际单位制 when designing products.

工程师在设计产品时必须遵循国际单位制 国际单位制。

4.When converting measurements, it is important to use the international system of units (SI) 国际单位制 to avoid confusion.

在转换测量时，使用国际单位制 国际单位制以避免混淆是很重要的。

5.The international system of units (SI) 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。

作文

The international system of units (SI) is a comprehensive and universally accepted system used for measurement in science, industry, and everyday life. It provides a standard framework that allows for consistent communication of measurements across different fields and countries. The international system of units (SI) was established to address the confusion caused by various measurement systems that existed prior to its introduction. Before the adoption of the international system of units (SI), different regions operated with their own units, which often led to misunderstandings and errors in calculations. For example, a meter was not universally recognized, and a foot could vary significantly from one country to another.The international system of units (SI) comprises seven base units: the meter for length, the kilogram for mass, the second for time, the ampere for electric current, the kelvin for temperature, the mole for the amount of substance, and the candela for luminous intensity. Each of these units serves as a foundation for deriving other units, known as derived units. For instance, speed is measured in meters per second (m/s), which combines the base unit of length (meter) and the base unit of time (second).One of the most significant advantages of the international system of units (SI) is its simplicity and coherence. The system is based on decimal multiples and submultiples, making it easier to convert between units. For example, converting kilometers to meters involves multiplying by 1,000, while converting liters to milliliters involves multiplying by 1,000 as well. This straightforward approach reduces the likelihood of errors in calculations and enhances the efficiency of scientific research and industrial processes.Moreover, the international system of units (SI) is continually evolving. The International System of Units is governed by the General Conference on Weights and Measures (CGPM), which meets every four years to discuss updates and improvements to the system. In recent years, there have been significant changes to the definitions of some base units. For instance, in 2019, the kilogram's definition was changed from a physical object (the International Prototype of the Kilogram) to a value based on fundamental constants of nature, specifically the Planck constant. This shift demonstrates the international system of units (SI)'s commitment to precision and accuracy in measurement.In everyday life, the impact of the international system of units (SI) is evident in various sectors, including healthcare, engineering, and education. Medical professionals rely on SI units to prescribe medication dosages accurately, while engineers use them to design structures and systems that meet safety standards. In education, students learn the international system of units (SI) as part of their science curriculum, enabling them to engage with global scientific communities effectively.In conclusion, the international system of units (SI) is an essential framework for measurement that promotes clarity, consistency, and collaboration across different disciplines and countries. Its ongoing development reflects the importance of precision in our increasingly interconnected world. By adopting the international system of units (SI), we can ensure that our measurements are universally understood and accepted, paving the way for advancements in science, technology, and daily life.

国际单位制（SI）是一个全面且被普遍接受的测量系统，广泛应用于科学、工业和日常生活中。它提供了一个标准框架，使得不同领域和国家之间可以一致地交流测量结果。国际单位制（SI）的建立旨在解决其推出之前存在的各种测量系统所造成的混乱。在国际单位制（SI）采用之前，不同地区使用自己的单位，这常常导致误解和计算错误。例如，米并不是普遍认可的单位，而英尺在不同国家之间可能会有显著差异。国际单位制（SI）由七个基本单位组成：长度的米，质量的千克，时间的秒，电流的安培，温度的开尔文，物质的摩尔，以及光强度的坎德拉。这些单位中的每一个都作为推导其他单位的基础，例如，速度以米每秒（m/s）为单位，这结合了长度的基本单位（米）和时间的基本单位（秒）。国际单位制（SI）的一个显著优势是其简单性和一致性。该系统基于十进制的倍数和分数，使得单位之间的转换更为容易。例如，将公里转换为米只需乘以1000，而将升转换为毫升也需要乘以1000。这种直接的方法减少了计算错误的可能性，提高了科学研究和工业过程的效率。此外，国际单位制（SI）也在不断发展。国际单位制由国际计量局（CGPM）管理，该机构每四年召开一次会议，讨论系统的更新和改进。近年来，一些基本单位的定义发生了重大变化。例如，在2019年，千克的定义从一个物理对象（国际千克原器）更改为基于自然基本常数的数值，具体来说是普朗克常数。这一转变展示了国际单位制（SI）在测量精确性和准确性方面的承诺。在日常生活中，国际单位制（SI）的影响在医疗、工程和教育等各个领域都显而易见。医疗专业人员依赖SI单位来准确开处方药物剂量，而工程师则使用这些单位设计符合安全标准的结构和系统。在教育中，学生们在科学课程中学习国际单位制（SI），使他们能够有效地与全球科学界接轨。总之，国际单位制（SI）是一个促进不同学科和国家之间清晰、一致和合作的重要测量框架。其持续的发展反映了在我们日益互联的世界中精确度的重要性。通过采用国际单位制（SI），我们可以确保我们的测量在全球范围内被理解和接受，为科学、技术和日常生活的进步铺平道路。