apparent density

apparent density的音标是[əˈpærənt ˈdensɪtɪ]，基本翻译是“表面密度”，速记技巧是“apparent”可以缩写为“ap”。表面密度是指物体在单位体积或单位面积上具有的质量或密度。

Apparent density 的英文词源是拉丁语“apparentia”和“densitas”，意为物质在液体或气体中的堆积程度。

变化形式：英式英语中，density（n.）和apparent（adj.）都与该词源有关。

相关单词：

1. density - 密度，表示物质在空间中的堆积程度。

2. dense - 密集的，表示物质在空间中堆积紧密。

3. densely - 密集地，表示物质在空间中堆积紧密地。

4. densification - 密集化，表示物质在空间中堆积程度的增加。

5. density gradient - 密度梯度，表示物质在液体或气体中堆积程度的变化。

6. density-based - 基于密度的，表示基于物质堆积程度的分析方法。

7. density-dependent - 密度依赖的，表示物质在特定环境中的堆积程度与其它因素有关。

8. density-reducing - 减少密度的，表示通过某种方法降低物质的堆积程度。

9. density-specific heat - 密度特定热容，表示物质在特定密度下的热容。

10. apparent density - 表观密度，表示物质在容器中的堆积程度，通常用于评估材料的体积和质量关系。

短语：

1. apparent density of water

2. apparent density of sand

3. apparent density of cement

4. apparent density of soil

5. apparent density of air

6. apparent density of metal

7. apparent density of plastic

例句：

1. The apparent density of water is a crucial factor in determining its boiling point.

2. The apparent density of sand determines its sedimentation rate in water.

3. The apparent density of cement determines its strength and durability.

4. The apparent density of soil determines its water retention capacity and permeability.

5. The apparent density of air determines its compressibility and buoyancy.

6. The apparent density of metal determines its weight and strength.

7. The apparent density of plastic determines its hardness and wear resistance.

英文小作文：

The importance of apparent density in materials science and engineering is significant, as it affects various properties such as strength, weight, water retention, and compressibility. For example, the apparent density of water determines its boiling point, while the apparent density of sand determines its sedimentation rate in water. Similarly, the apparent density of cement determines its strength and durability, while the apparent density of plastic determines its hardness and wear resistance. Therefore, it is crucial to carefully measure the apparent density of materials to ensure their optimal performance and safety in various applications.