作底（zuò dǐ）

Pronunciation: zuò dǐ

Basic Meaning: to serve as a foundation or basis

Detailed Explanation: The phrase "作底" originated from the game of Mahjong, where it refers to the act of discarding a tile to serve as the foundation for a winning hand. In a broader sense, it means to provide a basis or foundation for something.

Usage Scenarios: This idiom is often used to describe the role of something as a foundation or basis in various contexts, such as in business, relationships, or academic studies.

Story Origin: The origin of this idiom can be traced back to the game of Mahjong, which is a popular Chinese tile-based game. In the game, players discard tiles to build a winning hand, and the discarded tiles serve as the foundation for other players' strategies. Over time, the phrase "作底" was adopted in daily language to describe the act of providing a foundation or basis.

Structure of the Idiom: "作底" is a verb-object phrase, where "作" means "to do" or "to make," and "底" means "foundation" or "basis."

Example Sentences:

1. 這份報(bào)告是作底，我們可以根據(jù)它來制定我們的計(jì)劃。

Translation: This report serves as a foundation, and we can develop our plan based on it.

2. 這本書是作底，可以幫助你理解這個(gè)概念的基本原理。

Translation: This book provides a basis and can help you understand the basic principles of this concept.

Memory Techniques: To remember the meaning of "作底," you can associate it with the game of Mahjong. Imagine discarding a tile to create a winning hand, which serves as the foundation for your victory.

Extended Learning: To further understand the concept of "作底," you can explore related idioms and phrases, such as "打底" (to lay a foundation) or "根基" (foundation). Additionally, you can learn more about the cultural significance of Mahjong in Chinese society.

Example Sentences from Different Age Groups:

1. Children: 我把這本書作底，然后寫了一篇關(guān)于動(dòng)物的作文。

Translation: I used this book as a foundation and wrote a composition about animals.

2. Teenagers: 我們需要先做好規(guī)劃作底，才能順利完成這個(gè)項(xiàng)目。

Translation: We need to make a good plan as a basis before we can successfully complete this project.

3. Adults: 這份市場調(diào)研報(bào)告是作底，我們可以根據(jù)它來制定我們的銷售策略。

Translation: This market research report serves as a foundation, and we can develop our sales strategy based on it.