in depth的音標是[?n d??p]，基本翻譯為“深入地；逐一地；徹底地”，速記技巧為“in”表示“深入”，“depth”表示“深度”。這個詞組可以用來形容對某個主題或問題的深入研究，也可以用來形容對某個事物的全面了解。

In depth: 深入的

詞源：in- 進入，deep- 深的，組合起來表示深入地進入某個領域。

變化形式：無變化。

相關單詞：

1. Depth - 深度：在英語中，“深度”這個詞來源于拉丁語“profundere”，意思是“深入”。這個詞后來被引入英語，并被用來描述物體或空間在某個方向上的距離。

2. Depreciate - 貶值：這個詞來源于法語“dépérir”，意思是“變得破舊”。它最初用來描述商品由于時間的流逝或使用而變得不值錢的現象。

3. Depth of field - 景深：這個詞是由“深度”和“領域”組成的合成詞，用來描述攝影中相機鏡頭所能覆蓋的深度范圍。

4. Depth perception - 深度感知：這個詞來源于古希臘語“persephone”，意思是“對深度的理解”。它用來描述人類或其他生物對物體在三維空間中的距離和位置的感知能力。

5. Depth of feeling - 感情深度：這個詞是由“深度”和“感情”組成的合成詞，用來描述情感或感情的強烈程度或深度。

6. Depth of knowledge - 知識深度：這個詞是由“深度”和“知識”組成的合成詞，用來描述對某個領域或主題的理解程度。

7. Depth of understanding - 理解深度：這個詞是由“深度”和“理解”組成的合成詞，用來描述對某個概念或觀點的理解程度。

8. Depth of field photography - 景深攝影：這是一種攝影技術，通過調整相機鏡頭和拍攝距離來控制照片中所有清晰對象的范圍，創造出一種視覺效果，使觀眾更加關注照片的主題。

9. Depth of field effect - 景深效果：這是指在攝影中，通過控制景深來創造出一種視覺效果，使觀眾更加關注照片的主題。這種效果通常用于肖像、風景和靜物攝影。

10. Depth of thought - 思想深度：這個詞是由“深度”和“思想”組成的合成詞，用來描述思考的深度或復雜性。它通常用于描述思考者對某個問題或主題的思考和理解程度。

常用短語：

1. in depth

2. go into detail

3. delve into

4. explore in detail

5. examine in detail

6. investigate in detail

7. research in depth

例句：

1. We need to go into detail about the project before we commit a mistake.

2. The teacher delved into the meaning of the text to make sure that all students understood it.

3. The company explored in detail all possible market opportunities before investing in a new product.

4. The police investigated in detail the circumstances of the accident to find out who was responsible for it.

5. After researching in depth, we found that the product had many advantages over its competitors.

6. We need to research in depth about the new technology before we can implement it in our company.

7. The book delves into the complexities of human relationships and the challenges they present.

英文小作文：

In depth exploration of a topic is essential to gain a full understanding of it. When exploring a new field, it is important to delve into the details and examine all aspects of it to fully understand its nature and implications. This requires time, effort, and dedication, but the rewards are worth it. By doing so, we can gain a deeper understanding of the topic and develop new perspectives that can help us make better decisions and contribute to society in a more meaningful way.