density

density ["densti]

音标：/dɛnˈsti/

基本翻译：密集度；密度

速记技巧：den（谐音：等）+ sit（坐）→等坐在一起→密度大→密度

例句：The density of the iron ore is 4.5%. 铁矿石的密度为4.5%。

density的英文词源：

词根：density，表示“密集度，密度”

变化形式：复数形式：densities；第三人称单数：density；现在分词：dense；过去式：densed；过去分词：dense。

相关单词：

density [dens-ity]：n. 密集度，密度；浓度；浓度大。

dense [dens]：adj. 密集的；浓厚的；笨的；糊涂的。

densely [dens-li]：adv. 密集地；浓厚地。

denseness [den-sis]：n. 密集；稠密。

densify [den-sifai]：v. 使变稠密。

densimeter [den-simet-er]：n. 密度计。

densely packed [den-sli pækid]：adj. 密集地挤满的。

density gradient [den-si-grit]：n. 密度梯度。

densely populated [den-sli prupulvd]：adj. 人口稠密的。

密度是物质的一个特性，它是指物质单位体积内的质量大小，密度高的物质往往更紧密，因此具有更高的压缩性、更强的抗拉性等物理特性。在科学、工程学、地质学等领域，密度是一个重要的参数。同时，它也与我们的日常生活密切相关，如建筑材料、食品生产等。通过了解这个词的词源和变化形式，我们可以更好地理解这个词的含义和用途。

常用短语：

1. population density

2. density gradient

3. density functional theory

4. density of states

5. density of population

6. density of states formula

7. density of states method

例句：

1. The city has a high population density, making it difficult to find open space.

2. The density gradient separates the sample into its components based on their relative density.

3. Density functional theory is a powerful tool for predicting the properties of materials.

4. The density of states formula is used to calculate the energy levels of electrons in a material.

5. The density of population in rural areas is much lower than that in urban areas.

6. The density method is commonly used in detecting the presence of bacteria or viruses in water or food.

7. The density of information technology resources is increasing rapidly, making it difficult to keep up with the latest trends.

英文小作文：

Density is a crucial concept in science and engineering, and it plays a significant role in many fields of study. From the study of materials to the analysis of biological systems, density is a fundamental parameter that needs to be carefully considered.

In materials science, density is closely related to mechanical properties such as strength and toughness. Understanding the density of a material helps us to predict its behavior under various conditions, which can be crucial for designing effective materials and structures.

Similarly, density is also important in biology, where it can be used to estimate the amount of tissue or organ mass present in an organism. For example, knowing the density of a tumor or organ can help doctors determine its size and shape, which can be useful for diagnosis and treatment planning.

Moreover, density is also closely related to energy and matter conservation, which are fundamental principles in physics and chemistry. Understanding the relationship between these concepts can help us to better understand the universe and our place within it.

In conclusion, density is an essential concept that needs to be carefully considered in any scientific or engineering endeavor. It plays a crucial role in many fields of study, from materials science to biology, and from physics to chemistry.