substances

简明释义

英[ˈsʌbstənsɪz]美[ˈsʌbstənsɪz]

n. [物]物质；基本内容；物品药物（substance 的复数）

英英释义

单词用法

同义词

反义词

例句

1.Less dense substances move upwards to form a crust.

密度小的物质向上浮动并形成一层皮。

2.All substances, all forms of matter, can be distinguished according to what wavelength of light they absorb and which ones they reflect.

所有形式的物质，都可以根据它们吸收的光的波长以及反射的光的波长来区分。

3.In study after study, there's a positive reaction in almost one-third of the patients taking harmless substances.

在一项又一项研究中，几乎有三分之一的病人在服用无害物质后产生了正反应。

4.Some poisonous substances are flowing into the rivers that are sources of our drinking water.

一些有毒物质流入我们作为饮用水的河流中。

5.Now, Laser Spectroscopy, which is the focus of your assignment, works by measuring very precisely what parts of the spectrum are absorbed by different substances.

现在来说说激光光谱学，这是你们作业的重点，激光光谱学可以非常精确地测量光谱的哪些部分被不同物质吸收。

6.These noxious substances limit caterpillars' growth and reduce the number of eggs that female moths lay.

这些有毒物质会限制毛毛虫的生长，减少雌蛾产卵的数量。

7.Ok, venomous snakes are the ones that secrete poisonous substances or venom, like the snakes of the viper family or cobras.

毒蛇是一种分泌有毒物质或毒液的动物，像蝰蛇科的蛇或眼镜蛇。

8.Now, Laser Spectroscopy, which is the focus of your assignment, works by measuring very precisely what parts of the spectrum are absorbed by different substances.

现在来说说激光光谱学，这是你们作业的重点，激光光谱学可以非常精确地测量光谱的哪些部分被不同物质吸收。

9.Some substances can be toxic if ingested in large quantities.

一些物质如果大量摄入可能是有毒的。

10.The chef uses fresh substances to enhance the flavor of the dish.

厨师使用新鲜的物质来增强菜肴的风味。

11.The laboratory is testing various substances for their chemical properties.

实验室正在测试各种物质的化学性质。

12.In chemistry, we study how different substances react with each other.

在化学中，我们研究不同的物质如何相互反应。

13.Many household cleaning products contain harmful substances.

许多家用清洁产品含有有害的物质。

作文

In the realm of science, the term substances (物质) plays a pivotal role in understanding the world around us. A substance is defined as a form of matter that has a specific chemical composition and distinct properties. These substances can exist in various states, including solids, liquids, and gases. Each state of matter presents unique characteristics that are essential for different applications in our daily lives.For instance, water is a common substance (物质) that exists in all three states. In its solid form, it is ice; in liquid form, it is the water we drink; and as a gas, it becomes water vapor. The ability of substances to change states is crucial for many natural processes and industrial applications. Understanding these transitions helps scientists and engineers develop new technologies and improve existing ones.Moreover, substances (物质) can be classified into two main categories: elements and compounds. Elements are pure substances that cannot be broken down into simpler forms. They are the building blocks of all matter and are represented on the periodic table. On the other hand, compounds are substances formed when two or more elements chemically bond together. For example, water (H2O) is a compound made from hydrogen and oxygen.The study of substances (物质) extends beyond chemistry; it is also vital in fields such as biology, physics, and environmental science. In biology, understanding the substances that make up living organisms is essential for studying life processes. Proteins, carbohydrates, lipids, and nucleic acids are all examples of biological substances that play critical roles in maintaining life.In physics, the behavior of substances under different conditions is studied to understand the fundamental laws of nature. For instance, how substances react to temperature changes can reveal insights into energy transfer and thermodynamics. This knowledge is applicable in areas such as engineering, where materials must withstand specific temperatures and pressures.Environmental science also heavily relies on the study of substances (物质). Understanding the chemical composition of pollutants, for example, is crucial for developing strategies to combat environmental issues. By analyzing the substances present in air, water, and soil, scientists can assess the health of ecosystems and the impact of human activities on the planet.In conclusion, the concept of substances (物质) is foundational in various scientific disciplines. From the simplest elements to complex compounds, substances shape our understanding of the physical world and influence countless aspects of our lives. As we continue to explore and manipulate these substances, we unlock new possibilities for innovation and sustainability, ultimately improving our quality of life and preserving our environment for future generations.

在科学领域，术语substances（物质）在理解我们周围的世界中扮演着关键角色。substance被定义为具有特定化学成分和独特性质的物质形式。这些substances可以存在于不同的状态，包括固体、液体和气体。每种物质状态都呈现出独特的特征，这对我们日常生活中的不同应用至关重要。例如，水是一种常见的substance（物质），以三种状态存在。在其固态下，它是冰；在液态下，它是我们饮用的水；而作为气体，它变成水蒸气。substances的状态转变能力对于许多自然过程和工业应用至关重要。理解这些转变帮助科学家和工程师开发新技术并改善现有技术。此外，substances（物质）可以分为两大类：元素和化合物。元素是不能被分解为更简单形式的纯substances。它们是所有物质的基本构件，并在周期表上表示。另一方面，化合物是由两个或多个元素化学结合形成的substance。例如，水（H2O）是由氢和氧组成的化合物。对substances（物质）的研究不仅限于化学；在生物学、物理学和环境科学等领域也至关重要。在生物学中，理解构成生物体的substances对于研究生命过程至关重要。蛋白质、碳水化合物、脂质和核酸都是在维持生命中发挥关键作用的生物substances的例子。在物理学中，研究substances在不同条件下的行为是理解自然基本法则的关键。例如，substances对温度变化的反应可以揭示能量转移和热力学的见解。这种知识在工程等领域中具有应用价值，在这些领域中，材料必须承受特定的温度和压力。环境科学也严重依赖于对substances（物质）的研究。理解污染物的化学成分对于制定应对环境问题的策略至关重要。通过分析空气、水和土壤中的substances，科学家可以评估生态系统的健康状况以及人类活动对地球的影响。总之，substances（物质）的概念在各个科学学科中都是基础。从最简单的元素到复杂的化合物，substances塑造了我们对物理世界的理解，并影响着我们生活的无数方面。随着我们继续探索和操控这些substances，我们为创新和可持续性开启了新的可能性，最终改善我们的生活质量并保护我们的环境，以惠及未来世代。