Here are a few options for a clear and concise description for the WordPress post tag “時間長度” (Time Duration) in Traditional Chinese, catering to different potential uses:

**Option 1 (General & Simple):**

> 這個標籤涵蓋與時間長度相關的文章，包括活動、影片、課程等的時長。
>
> *This tag covers articles related to time duration, including the duration of events, videos, courses, etc.*

**Option 2 (Slightly More Detailed):**

> 使用此標籤來分類討論時間長度的文章，例如：專案的持續時間、烹飪所需的時間、影片的播放長度，或是任何涉及時間量度的內容。
>
> *Use this tag to categorize articles discussing time duration, for example: the duration of a project, the time required for cooking, the playback length of a video, or any content involving the measurement of time.*

**Option 3 (Focus on Content Type Specificity – Best if you have a related content type/category):**

> 有關時間長度資訊的文章，如活動持續時間、影片長度、或課程的時長。 方便您快速找到相關內容。 (例如: [您特定的類目錄的名稱] 這個部分)
>
> *Articles providing information about time duration, such as event durations, video lengths, or course durations. This helps you quickly find related content. (e.g., specifically for [Name of your specific category])*

**Option 4 (Focus on Searchability – good for SEO):**

> 寻找与“時間長度”相关的文章，在这里您可以找到关于时长、持续时间、以及相关时间概念。 包括例如：時間規劃、時間管理、完成任務的時間等。
>
> *Find articles related to “Time Duration”. Here you can find information about length, duration, and related time concepts. Including time planning, time management and the time required for completing tasks, and and so on.*

**Choosing the Best Option:**

* **Consider your website’s content:** Which of these descriptions most accurately reflects the type of content you’ll be tagging?
* **Think about your audience:** Are they beginners or more experienced? Simpler descriptions are better for beginners.
* **SEO:** If keywords are important, Option 4 might be better.
* **Consistency:** Choose a description style and stick to it for all of your tags for consistency.

Remember to keep the description clear, concise, and informative. Good luck!