the scientific measurement of light in terms of its intensity, color, and other properties
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光度测定
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an instrument used to measure and indicate the altitude of an object above a fixed level, typically the Earth's surface
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高度表
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the unit of electric current, symbolized as "A" in the International System of Units (SI)
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安培
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the measurement of land elevation variations comparing to sea level or a chosen reference point
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测高法
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the measurement and analysis of water flow, levels, and properties in natural bodies of water and hydraulic systems
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比重测定法
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the measurement and analysis of the spectrum of electromagnetic radiation emitted or absorbed by substances
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光谱测定法
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a device used to measure the electric potential difference between two points in an electrical circuit
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电表
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a device used to measure the pressure of gases or liquids in a closed system, typically by comparing it to atmospheric pressure
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压力计
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the scientific study of measurement, including the development of measurement standards and techniques
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度量衡学
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the measurement of variations in gravitational fields to understand the Earth's structure and properties
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重力测定法
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a measure of the brightness of a light source as perceived by the human eye
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亮度单位
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