dihedral

dihedral的音标为[ˌdaɪəˈherl] ，基本翻译为“二面角”，速记技巧为：“dia”表示“两个”，“he”表示“面”，“real”表示“角”。

Dihedral这个词来源于拉丁语，意为“旋转”。它的变化形式包括名词的复数dihedra和形容词的dihedral。

相关单词：

1. Pitchfork - 这是一个与dihedral相关的单词，指的是一种有四个角的叉子，常用于建筑中，用于确定屋顶的角度。

2. Conical - 这是一个形容词，来源于拉丁语，与dihedral有关，指的是圆锥形的。

3. Pyramid - 这是一个与dihedral相关的名词，指的是金字塔形状的结构。

4. Dome - 这是一个与dihedral相关的名词，指的是圆顶形状的结构。

5. Pavilion - 这是一个与dihedral相关的名词，指的是亭子或类似的结构。

6. Radius - 这是一个名词，与dihedral有关，指的是圆的半径。

7. Diagonally - 这是一个副词，与dihedral有关，表示垂直或水平地斜着。

8. Conjugate - 这是一个形容词，与dihedral有关，表示配对的或相关的。

9. Hinge - 这是一个名词，与dihedral有关，指的是铰链或关节。

10. Pitch - 这是一个名词，与dihedral有关，表示倾斜的角度或程度。

以上单词都与旋转、角度、圆锥形、圆顶、亭子等概念有关，体现了dihedral这个词在英语中的广泛应用。

常用短语：

1. dihedral angle

2. planar dihedral angle

3. dihedral symmetry

4. dihedral group

5. dihedral motion

6. dihedral angle of twist

7. dihedral angle of rotation

例句：

1. The two planes meet at a planar dihedral angle of 60 degrees.

2. The dihedral symmetry of the crystal structure is a hallmark of its stability.

3. The dihedral motion of the molecule allows for flexibility and adaptability.

4. The dihedral angle of rotation determines the orientation of the molecule in space.

5. The dihedral angle of twist determines the direction of the helix in DNA.

6. The dihedral angle is a crucial factor in determining the stability and flexibility of polymers.

英文小作文：

Title: Dihedral Angle: The Key to Understanding Polymer Stability and Flexibility

Dihedral angles are crucial factors in determining the properties of polymers, which are essential in a wide range of applications, from plastics to fibers to biomaterials. Understanding the role of dihedral angles in polymer structure and dynamics can help us design more stable and flexible materials with tailored properties.

The dihedral angle of rotation determines the orientation of the polymer chain in space, while the dihedral angle of twist determines the direction of the helix in polymers such as DNA and proteins. These angles also affect the flexibility and stability of polymers, as they allow for bending and twisting motions that are essential for adapting to different environments and performing various functions.

In addition, the dihedral angle can be used to design polymers with specific functions, such as optical or magnetic properties. By controlling the dihedral angles, we can manipulate the way light or magnetic fields interact with the polymer, leading to novel applications in areas such as optical switching or magnetic recording.

Overall, the dihedral angle is an essential concept in polymer science that helps us understand the structure and dynamics of polymers and design materials with tailored properties for a wide range of applications.