Here are a few options for a WordPress post_tag description for the title “學期” in Traditional Chinese, each with a slightly different focus:

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

> 一学年中的一段时间，通常指的是春季、秋季等。 用來區分學習階段。
>
> *(A period of time within an academic year, typically referring to semesters like spring or fall. Used to differentiate stages of learning.)*

**Option 2 (Academic Context):**

> 在教育制度中，學期是学生学习的时期，由多个单元组合而成。 涵盖学习、考试等活动。
>
> *(In the education system, a semester is the period of study for students, comprised of multiple units. It encompasses learning, examinations, and other activities.)*

**Option 3 (Focus on Use):**

> 在文章中標示與學年時段相關的內容。 包括時間範圍、课程安排、学习进度等。
>
> *(Marks content in articles related to academic year periods. Includes timeframes, course schedules, learning progress, etc.)*

**Option 4 (More Detailed – for a more complex website):**

> 標示與學期相關的文章與內容，涵蓋不同的學期 (例如：春季學期、秋季學期)，以及學期內的活動、課程、考試等。 方便讀者更容易找到特定時間階段的資訊。
>
> *(Used to categorize articles and content related to the semester, covering different semesters (e.g., spring semester, fall semester), as well as activities, courses, and exams within the semester. Makes it easier for readers to find information related to specific time periods.)*

**Key considerations when choosing:**

* **Your target audience and website’s focus:** Are you targeting students, parents, or the general public?
* **The type of content tagged with “學期”:** Will it be news about the academic year, course schedules, or reflections on the learning process?
* **SEO optimization:** Do you want to include relevant keywords within the description? (e.g., “春秋學期” (spring and fall semesters), “課程” (courses), “學生” (students)).

I recommend choosing the option that best fits the content and purpose of your website. Consider adding a couple of keywords when it works organically. Good luck!