absorptance的音標是[?b?s??pt?ns]，基本翻譯是吸收率。速記技巧是將其分解為幾個部分進行記憶，如absorb（吸收）+ance（狀態）等。

Absorptance的英文詞源可以追溯到拉丁語absorbere，意為“吸收”。Absorptance的變化形式主要有absorption（吸收）和absorptive（吸收的）。

相關單詞：

1. Absorbency - 吸收性，來源于absorbance，表示能夠吸收物質的能力。

2. Absorbent - 吸收的，來源于absorb，表示能夠吸收液體或其他物質的物體。

3. Absorptivity - 吸收率，表示物質吸收光的能力。

4. Absorptivity - 吸收，來源于absorb，表示物體吸收光線、聲音等的能力。

Absorptance是光學中的一個重要概念，它描述的是物質吸收光的能力。在物理學和化學中，吸收率是一個重要的參數，它影響著物質的性質和功能。Absorptance的應用范圍廣泛，包括光學、材料科學、化學、生物醫學等領域。

Absorptance 的常用短語：

1. total absorptance 完全吸收率

2. absorptance coefficient 吸收系數

3. absorptance curve 吸收曲線

4. absorptance ratio 吸收率比

5. diffuse absorptance 散射吸收率

6. absorptance spectrum 吸收光譜

7. absorptance curve analysis 吸收曲線分析

例句：

1. The absorptance of the material determines how much light it will absorb.

該材料的吸收率決定了它吸收多少光。

2. The absorptance of sunlight varies depending on the angle of incidence.

太陽光的吸收率會根據入射角度的不同而變化。

3. The absorptance of a material depends on its chemical composition and structure.

材料的吸收率取決于其化學成分和結構。

英文小作文：

Absorptance is an important parameter to measure the performance of materials in light absorption. When light interacts with materials, some of it is reflected, some transmitted, and some is absorbed. The absorptance of a material is the amount of light that is actually absorbed by the material.

In nature, many materials have high absorptance for sunlight. For example, leaves and plants use sunlight as a source of energy, and their high absorptance helps them to absorb and use this energy efficiently. Similarly, solar panels also have high absorptance to convert sunlight into electricity.

However, not all materials with high absorptance are suitable for use in solar energy conversion systems. Some materials may have high absorptance but poor reflectance, which can lead to overheating and damage to the materials or systems that use them. Therefore, it is important to carefully consider the absorptance and reflectance of materials used in solar energy conversion systems to ensure they operate efficiently and safely.