emissivity

emissivity的音标是["iːmɪˈsɪvɪtɪ]，意思是辐射率。

速记技巧：emissivity是一个合成词，由emissive（辐射的）和ivity（性）组成。可以尝试将单词划分为几个部分来记忆，即“e-mi-si-vi-ty”，其中e可以想象成灯泡，mi是明亮的，si可以理解为辐射物质，vi是病毒，ity是名词后缀。这样，可以想象灯泡里充满了辐射物质，而这种物质具有病毒一样的特性，会向外辐射能量。

希望以上内容对你有帮助。

Emissivity这个词来源于拉丁语emissivus，意为“发射的”。它的词源表明了它与辐射、发射、放射等概念有关。

变化形式：

名词形式为emissivity，形容词形式为emissive。

相关单词：

1. Emission（发射） - 指物体释放或放射出某种物质或能量。

2. Radiative Emission（辐射发射） - 指物体通过辐射方式释放能量或物质。

3. Radiation（辐射） - 指物体向外发射的电磁波或粒子。

4. Emissive Body（发射体） - 指能够发射某种物质或能量的物体。

5. Emissive Surface（发射表面） - 指能够向外发射电磁波或粒子的表面。

6. Emissive Process（发射过程） - 指物体向外发射物质或能量的过程。

7. Emissive Material（发射物质） - 指能够向外发射某种物质的材料。

8. Emissive Rate（发射率） - 指物体向外发射某种物质或能量的速率。

9. Emissive Surface Density（发射表面密度） - 指单位面积上的发射表面数量。

10. Emissive Spectrum（发射光谱） - 指物体向外发射的电磁波谱。

emissivity常用短语：

1. emissivity coefficient

2. emissivity ratio

3. emissivity curve

4. emissivity factor

5. emissivity coefficient of a surface

6. emissivity of a blackbody

7. emissivity of a radiator

双语例句：

1. The emissivity of the sun is very high, so it radiates a lot of energy.

2. The emissivity of a blackbody depends on its temperature and composition.

3. The emissivity of a radiator determines how much heat it generates.

4. The surface of the object should have a low emissivity to reduce heat loss.

5. The emissivity of the atmosphere varies with the weather conditions.

6. The emissivity of the moon is much lower than that of the earth"s surface.

7. The emissivity of the sun"s corona is much higher than that of the surface.

英文小作文：

The Emissivity of Radiators and the Nature of Heat Radiation

Radiators are devices that emit heat energy, which is essential for maintaining a comfortable temperature in our homes and buildings. The emissivity of a radiator determines how much heat it generates, and it is closely related to the nature of heat radiation. A radiator with a high emissivity will emit more heat, while one with a low emissivity will lose heat more easily.

The nature of heat radiation is also affected by the properties of the medium through which it travels. For example, infrared radiation travels through air more easily than visible light, and this is why we can see objects in the dark even if there is no light source. Similarly, the emissivity of a radiator depends on its temperature and composition, which in turn affects how much heat it generates. Understanding these principles is essential for effectively managing heat in our homes and buildings.