expounder的音標為[?k?spa?nd?(r)]，基本意思是“闡述者，解釋者；詳述者”，在句子中常作主語或賓語。expound的速記技巧包括：使用縮寫詞、使用符號和標記、使用圖像和圖形等。通過這些技巧，可以提高速記效率，提高記憶力和理解能力。

Expounder: 這個詞來源于拉丁語“exponere”，意為“展開，闡述”。它的變化形式包括過去式“expounded”，過去分詞“expounded”和現在分詞“expounding”。相關單詞包括：

1. Exposition: 這個詞來源于expounder，意為“闡述，解釋”。

2. Expound: 這個詞可以指詳細闡述或解釋某事物。

3. Exponents: 這是一個名詞，表示公式的符號。

4. Explicate: 這個詞意為“闡明，解釋清楚”。

5. Explicator: 這個詞可以指解釋者或闡述者。

6. Explicative: 這個詞意為“解釋的，闡明的”。

7. Expounder: 這個詞可以指詳細闡述或解釋某事物的專家。

8. Exponential: 這個詞意為“指數的”，與expounder有關，因為指數公式需要被闡述和解釋。

9. Exponential Function: 這是一個數學術語，表示以指數形式增長的函數。

10. Explanation: 這個詞意為“解釋，說明”，與expounder和exponents都有關。

以上這些單詞都與“展開，闡述”這一概念有關，體現了語言和概念之間的緊密聯系。

常用短語：

1. expound on 詳述

例句：He expounded on the importance of exercise.

2. expound the principles 闡述原則

例句：The professor expounded the principles of economics.

3. expound one"s views 闡述觀點

例句：She expounded her views on the issue at the meeting.

4. expound the facts 闡述事實

例句：He spent hours expounding the facts of the case.

5. expound the reasons 闡述原因

例句：She expounded the reasons for her decision in detail.

6. expound the theory 闡述理論

例句：He spent days trying to expound the theory behind the invention.

7. expound one"s knowledge 擴展知識

例句：He used to expound his knowledge of history to visitors.

英文小作文：

Explaining a Theory

When we learn a new theory, it is often helpful to expound on its principles, reasons, and implications. This helps us better understand the theory and develop a deeper appreciation for its importance.

When I first learned about quantum mechanics, I found it difficult to understand at first. But after reading and discussing with others, I began to see its beauty and power. I realized that it explained many phenomena that had previously been mysterious, such as light and matter interactions and the behavior of atoms and molecules.

To explain quantum mechanics to others, I would start by describing its basic principles, such as wave-particle duality and uncertainty principles. I would also explain how it explains certain phenomena, such as the way light behaves when it is scattered by particles or reflected by mirrors. Finally, I would discuss its implications for future research and applications, such as in quantum computing and cryptography.

By explaining a theory, we not only deepen our own understanding but also help others gain a better understanding of it. This is an important skill that we can use in many different contexts, whether it is explaining a new concept to a colleague or teaching a new student about a subject.