Here are a few description options for the WordPress post tag “機械” (Machinery) in Traditional Chinese, varying in length and focus:

**Option 1: Concise and General**

* **Description:** 涵蓋各種機械設備及其相關技術。 (Encompassing various machinery and related technologies.)

**Option 2: Slightly More Detailed**

* **Description:** 涵蓋各種機械、設備、工程，以及製造、設計和維修等相關主題。 (Encompassing various machinery, equipment, engineering, as well as related topics such as manufacturing, design, and maintenance.)

**Option 3: Focus on Practicality**

* **Description:** 探索機械世界的奧妙，包含工廠、生產、工具等相關知識與應用。 (Exploring the wonders of the mechanical world, including related knowledge and applications such as factories, production, and tools.)

**Option 4: Emphasis on Innovation**

* **Description:** 探索最新的機械技術發展，包括自動化、創新設計，以及機械在各行業的應用。 (Exploring the latest developments in mechanical technology, including automation, innovative design, and the application of machinery across various industries.)

**Option 5: Short and Sweet (for blogging)**

* **Description:** 關於機械的一切！ (Everything about Machinery!)

**How to choose the best option:**

* **Consider your audience:** Are they academic, hobbyists, or professionals?
* **Think about your content:** What specific aspects of “机械” (machinery) will you be writing about?
* **Keep it concise:** WordPress tag descriptions are typically best when they are short and to the point.

Choose the description that best reflects your overall content and target audience. You can add it to the tag in your WordPress admin panel when you’re editing the tag.