circumference

简明释义

英[səˈkʌmfərəns]美[sərˈkʌmfərəns]

n. 圆周，周长；周边，外围

复 数 c i r c u m f e r e n c e s

英英释义

单词用法

同义词

反义词

例句

1.When a hatter measures the circumference of your head, he's trying to work out what size of hat would fit you.

当一位制帽商测量你的头围时，他是为了找出适合你的帽子型号。

2.They find themselves surrounded, and Paris is one-third the size of London at this same time, or at any other time, but it has a huge circumference.

他们发现自己被包围了，而巴黎的面积相当于当时或其他任何时候伦敦的三分之一，但它的周长很大。

3.Estimate your body composition: Waist circumference and body mass index.

评估你的身体构成指数：腰围和体重指数。

4.A young English botanist named Charles Darwin, the author of the theory of evolution, was the first European to see alerces, with trunks that had a circumference of 130 feet.

进化论的作者、年轻的英国植物学家查尔斯·达尔文，是第一个看到落叶柏树干圆周长达一百三十英尺的欧洲人。

5.And, now, let's mention that we have a point that's been painted red on the circumference of the wheel.

现在，我们有一个点,这个点在车轮边缘，它被涂上红色。

6.This is the one that makes the speed change along the circumference.

这是导致速度，沿着圆周改变的因素。

7.In our geometry class, we learned how to measure the circumference 周长 of different shapes.

在我们的几何课上，我们学习了如何测量不同形状的circumference 周长。

8.To find the area of a circle, you need to know the radius and the circumference 周长.

要计算一个圆的面积，你需要知道半径和circumference 周长。

9.The circumference 周长 of a bicycle wheel affects how far you travel with each pedal stroke.

自行车轮子的circumference 周长影响你每次踩踏时行驶的距离。

10.The circumference 周长 of the Earth is about 40,075 kilometers.

地球的circumference 周长大约是40,075公里。

11.You can calculate the circumference 周长 of a circle using the formula C = 2πr.

你可以使用公式C = 2πr来计算一个圆的circumference 周长。

作文

The concept of circumference is fundamental in the study of geometry, particularly when dealing with circles. The circumference of a circle is defined as the distance around it, which can be calculated using the formula C = 2πr, where C represents the circumference, r is the radius, and π (pi) is a constant approximately equal to 3.14159. Understanding the circumference is not only crucial for mathematical calculations but also has practical applications in various fields such as engineering, architecture, and even art.When we think about the circumference of circular objects, we can easily relate it to everyday items. For instance, consider a bicycle wheel. The circumference determines how far the bike travels with each complete revolution of the wheel. If the circumference is larger, the bike will cover more ground with each turn. This principle is essential for cyclists who need to calculate distances traveled during their rides.Moreover, the circumference plays a significant role in design and manufacturing processes. Engineers often need to know the circumference of pipes or circular components to ensure they fit together correctly. In architecture, the circumference of columns or circular rooms can affect the aesthetic appeal and structural integrity of a building. Artists may also consider the circumference when creating sculptures or installations that involve circular shapes, as it impacts the overall visual balance of their work.In addition to its practical implications, the circumference has a rich historical background. Ancient civilizations, such as the Greeks and Egyptians, studied the properties of circles extensively. They realized that the circumference is directly proportional to the diameter of a circle, leading to the formulation of π. This mathematical constant has fascinated mathematicians for centuries and continues to be a topic of research today.Furthermore, understanding the circumference can enhance our appreciation for nature. Many natural forms exhibit circular patterns, from the rings of trees to the orbits of planets. By studying the circumference of these natural phenomena, we can gain insights into their growth, movement, and behavior. For example, the circumference of a tree trunk can indicate its age and health, while the circumference of a planet can help astronomers determine its size and mass.In conclusion, the term circumference encompasses much more than just a mathematical definition. It is a concept that bridges the gap between mathematics, science, art, and everyday life. Whether we are cycling down a road, designing a building, or observing the wonders of nature, the circumference is an integral part of our understanding of the world. By grasping the significance of the circumference, we can better appreciate the beauty and complexity of the circular forms that surround us.

‘周长’的概念在几何学的研究中是基础，特别是在处理圆的时候。一个圆的周长被定义为其周围的距离，可以使用公式C = 2πr来计算，其中C代表周长，r是半径，而π（圆周率）是一个常数，约等于3.14159。理解周长不仅对数学计算至关重要，还在工程、建筑甚至艺术等多个领域具有实际应用。当我们想到圆形物体的周长时，可以很容易地与日常物品联系起来。例如，考虑一下自行车轮子。周长决定了每次轮子完全转动时自行车行驶的距离。如果周长更大，自行车在每次转动中将覆盖更多的地面。这一原则对需要计算骑行过程中行驶距离的骑自行车者来说至关重要。此外，周长在设计和制造过程中也起着重要作用。工程师经常需要知道管道或圆形组件的周长以确保它们正确配合。在建筑中，柱子的周长或圆形房间的周长可以影响建筑的美观和结构完整性。艺术家在创作涉及圆形的雕塑或装置时，也可能会考虑周长，因为它会影响他们作品的整体视觉平衡。除了其实际意义外，周长还有丰富的历史背景。古代文明，如希腊人和埃及人，广泛研究了圆的性质。他们意识到周长与圆的直径直接成比例，从而导致了π的形成。这个数学常数几个世纪以来一直吸引着数学家，并且至今仍然是研究的主题。此外，理解周长可以增强我们对自然的欣赏。许多自然形式表现出圆形模式，从树木的年轮到行星的轨道。通过研究这些自然现象的周长，我们可以获得关于它们的生长、运动和行为的见解。例如，树干的周长可以指示其年龄和健康状况，而行星的周长可以帮助天文学家确定其大小和质量。总之，术语周长包含的内容远不止数学定义。它是连接数学、科学、艺术和日常生活的概念。无论我们是在公路上骑自行车、设计建筑，还是观察自然的奇观，周长都是我们理解世界的重要组成部分。通过掌握周长的意义，我们可以更好地欣赏环绕我们的圆形形式的美丽和复杂性。