the scientific measurement of light in terms of its intensity, color, and other properties
光度学
在实验室中，研究人员应用了测光技术来分析各种化学反应发出的光的颜色光谱。
an instrument used to measure and indicate the altitude of an object above a fixed level, typically the Earth's surface
高度表, 高度计
徒步旅行者使用高度计来跟踪他们在山区地形中的上升和下降，用于导航和安全。
a device used to measure the speed and direction of the wind
风速计, 风力计
水手们在出海前依靠风速计来测量风力。
the unit of electric current, symbolized as "A" in the International System of Units
安培, 安培
电器通常包括一个标签，标明它们消耗的电流量，以安培为单位测量。
a scientific instrument used to measure air pressure
气压计, 用于测量空气压力的科学仪器
水银气压计的突然变化提醒了水手们海上不稳定的天气状况。
a unit to measure the purity of gold, the purest gold being 24 karats
克拉, 衡量黄金纯度的单位
传家宝通常含有22克拉的黄金，与较低克拉值相比，其纯度更高，黄色色调更丰富。
the total length of the external boundary of something
周长
几何学生计算了矩形花园的周长，以确定需要多少围栏。
the measurement of land elevation variations comparing to sea level or a chosen reference point
测高学, 测量与海平面或选定参考点相比的土地高程变化
山谷的测高法显示了其低海拔。
the measurement and analysis of water flow, levels, and properties in natural bodies of water and hydraulic systems
水文测量, 水文測量學
环保主义者使用水文测量来监测湖泊中的水质。
the measurement and analysis of the spectrum of electromagnetic radiation emitted or absorbed by substances
光谱测定法, 光谱分析
光谱测定法有助于天文学家分析遥远恒星的组成。
a device used to measure the electric potential difference between two points in an electrical circuit
电压表, 电位差计
技术员将电压表连接到太阳能电池板上以测量其输出。
a device used to measure the pressure of gases in a closed system, typically by comparing it to atmospheric pressure
压力计, 测压装置
技术员使用了一个压力计来检查供暖系统中的气体压力。
a temperature sensor that generates electricity based on heat
热电偶, 温度传感器
科学家使用热电偶来测量化学反应的热量。
the scientific study of measurement, including the development of measurement standards and techniques
计量学, 测量科学
工程师使用计量学来校准机械以实现精确制造。
the scientific measurement of heat exchange in chemical or physical processes
量热法, 热量测量
科学家使用热量测定来确定食物的卡路里含量。
the measurement of variations in gravitational fields to understand the Earth's structure and properties
重力测量, 重力测量法
重力测量通过测量重力变化帮助地质学家绘制地下结构图。
a measure of the brightness of a light source as perceived by the human eye
亮度单位, 光度单位
亮度单位减少房间中的亮度单位。
the process of measuring how dense something is by assessing how much light it absorbs or transmits
密度测定, 密度测量
我们依靠密度测定法来准确评估材料的密度。
