單綫（dān xiàn）

Pronunciation: dān xiàn

Basic Meaning: single line

Detailed Explanation: The idiom "單綫" refers to a single line or a one-way street. It is used to describe a situation where there is only one option or one way to do something. It implies that there is no alternative or other choices available.

Usage Scenarios: This idiom is often used to describe a situation where there is no other option or alternative. It can be used in various contexts, such as decision-making, problem-solving, or describing a narrow path.

Story Origin: The origin of this idiom can be traced back to the concept of a one-way street. In ancient China, some roads were designed as single-lane streets, allowing traffic to flow in only one direction. This concept was later used metaphorically to describe situations where there is only one option or one way to do something.

Structure of the Idiom: The idiom "單綫" is composed of two characters: "單" meaning single or alone, and "綫" meaning line or thread.

Example Sentences:

1. 這個問題只有一個單綫的解決辦法。

Translation: There is only one way to solve this problem.

2. 在這個工作中，我們只有一個單綫的選擇。

Translation: In this job, we have only one option.

Memory Techniques: To remember the meaning of "單綫," you can imagine a narrow road with only one lane. Visualize yourself driving on this road, and remember that there is no other option or alternative.

Extended Learning: To further understand the concept of "單綫," you can explore other related idioms or expressions that convey a similar meaning, such as "一條道" (yī tiáo dào) or "一意孤行" (yī yì gū xíng).

Example Sentences by Different Age Groups:

1. Children: 在游戲中，只有一個單綫的通關方法。

Translation: In the game, there is only one way to pass the level.

2. Teenagers: 在選擇專業時，有時候只有一個單綫的選項。

Translation: Sometimes there is only one option when choosing a major.

3. Adults: 在公司的決策過程中，我們需要考慮到不只一個單綫的方案。

Translation: In the decision-making process of the company, we need to consider more than one option.