Here are a few options for describing the “排氣量” (Displacement) post tag in Traditional Chinese, with slightly different nuances:

**Option 1 (Concise and Clear):**

> **排氣量**：引擎的容積大小，影響著引擎的動力表現、油耗及稅賦。瞭解排氣量，讓你更懂汽車。

* **Translation:** Displacement: The size of an engine’s capacity, which affects its power, fuel consumption, and taxes. Understanding displacement helps you understand your car better.
* **Pros:** Directly explains what the tag represents, relevant to car enthusiasts, and easy to understand.
* **Cons:** Doesn’t extend beyond the basic explanation.

**Option 2 (Elaborating on Significance):**

> **排氣量**：代表引擎「心臟」的大小。排氣量越大，表示引擎能容納的氣體量越多，通常能產生更大的動力。想探索汽車性能的奧秘？就從排氣量開始吧！

* **Translation:** Displacement: Represents the size of the engine’s “heart.” The larger the displacement, the more gas the engine can hold, which usually produces more power. Want to explore the secrets of car performance? Start with displacement!
* **Pros:** Uses a metaphor (engine’s heart) for a more engaging read. Encourages users to explore the topic.
* **Cons:** Slightly less informative than option 1.

**Option 3 (For technical readers):**

> **排氣量**：指引擎活塞從最低點移動到最高點所能掃過的氣缸體積總和，常以cc (立方厘米) 或L (升) 為單位衡量。了解排氣量，可幫助比較不同引擎的性能及油耗。

* **Translation:** Displacement: Refers to the total volume swept by the engine pistons as they move from their lowest to highest points, often measured in cc (cubic centimeters) or L (liters). Understanding displacement can help you compare the performance and fuel consumption of different engines.
* **Pros:** Includes the technical definition and units of measurement. Provides specific practical use for that knowledge.
* **Cons:** The most complex of the three options.

**Option 4 (If using a WordPress tag that lists related posts automatically):**

> **排氣量**： 關於汽車引擎排氣量 (Displacement) 的文章。 探索排氣量知識，了解引擎大小如何影響車輛性能及其他相關資訊。

* **Translation:** Displacement: Articles about car engine displacement. Explore information on displacement to understand how engine size affects vehicle performance and other related information.
* **Pros:** Simple, direct, and informative. Good for an automated tag page.
* **Cons:** More general and less descriptive.

**Choosing the best option:**

Choose the description that best suits your blog’s audience and the level of detail you typically provide. If your audience is general, stick with Option 1 or 2. If you cater to a more technical crowd, Option 3 is a good choice. If you are using a template that lists related posts automaticaly, Option 4 is a suitable choice.