conchoid

conchoid的音标是[kənˈkəʊɪd]，意思是圆锥曲线的一种，母线以均匀速度自一圆周螺旋前进的螺旋线。速记技巧是：可以将其音译为“孔扣易”。

Conchoid的英文词源可以追溯到拉丁语“concha”和希腊语“κώνχω”或“κώνχος”，这两个词都表示贝壳或类似形状的物体。

变化形式：复数形式为conchoidea，过去式为conchoided和conchoidest，现在分词为conchoidean。

相关单词：

conchologist：研究软体动物学家，研究贝壳的专家。

conch：贝壳，螺壳。

conchshell：贝壳壳，螺壳。

conch-shell：贝壳做的装饰品。

conch-shell lamp：贝壳灯。

conch-shell music：用贝壳制造的音乐。

conch-shell trumpet：一种贝壳喇叭。

conch-shell vase：贝壳花瓶。

conch-shaped：贝壳形状的。

conchoid of a circle：圆锥曲线，圆母线。

以上这些单词都与conchoid有直接或间接的联系，它们在英语中广泛使用并描述各种与贝壳相关的物品和现象。

常用短语：

1. conchoid of rotation

2. conchoid of infinite radius

3. conchoidial curve

4. conchoidal surface

5. conchoidian

6. conchoidal form

7. conchoidal texture

双语例句：

1. The surface of the object is characterized by conchoidal texture.

2. The conchoid of rotation is a mathematical model used to describe the formation of a central figure from a series of circular arcs.

3. The conchoid of infinite radius is a mathematical concept that represents the limit of a conchoid as the radius approaches infinity.

4. Conchoidal surfaces are often found in nature and are used in engineering applications for their unique properties.

5. Conchoidian is a term used to describe objects that exhibit conchoidal form or texture.

6. The process of using a hammer to strike an object creates a conchoidal pattern on the surface of the object.

7. The resulting curve is a conchoidial curve, which can be used to describe the motion of a projectile launched from a slit or opening.

英文小作文：

Title: Conchoids: The Curious Mathematics of Formation

Conchoids, a fascinating mathematical phenomenon, can be observed in nature and in engineering applications. These curves are formed when a central figure is generated from circular arcs, and they are often characterized by their unique conchoidal texture and form.

In nature, conchoids are often observed in volcanic eruptions, where molten rock flows and forms patterns resembling conchoids. In engineering applications, conchoids are used to describe the motion of projectiles launched from slits or openings, and they can also be used to model the formation of craters on the surface of celestial bodies.

The mathematics behind conchoids is complex, but it can be explained using geometric concepts such as circles, arcs, and tangents. Conchoids are a beautiful example of how mathematics can be applied to explain natural phenomena and solve problems in engineering and other fields.