Here are a few description options for the WordPress post_tag “骨骼” (Skeletal) in Traditional Chinese, varying in length and focus:

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

> 用於標記與骨骼、解剖學及身體結構相關的文章。
>
> *Translation: Used to tag articles related to skeletal systems, anatomy, and bodily structure.*

**Option 2 (More Descriptive):**

> 標記涉及骨骼、骨骼系統、關節及相關主題的文章。涵蓋生物學、醫學、健康和健身等領域。
>
> *Translation: Tags articles that relate to the bones, skeletal systems, joints, and related topics. Covers areas such as biology, medicine, health, and fitness.*

**Option 3 (SEO-Focused):**

> 關鍵詞：骨骼、骨骼系統、骨骼健康、骨骼解剖、關節、解剖學、人體結構。用於標記與骨骼和肌肉骨骼等相關的文章，包括疾病、損傷、護理、健康建議和醫學資訊。
>
> *Translation: Keywords: Bone, skeletal system, bone health, skeletal anatomy, joints, anatomy, human structure. Used to tag articles related to the skeletal and musculoskeletal systems, including disease, injury, care, health advice, and medical information.*

**Option 4 (Emphasis on Education):**

> 標記有關骨骼的科普文章、教育資源、教學內容和研究分享。了解人體骨骼結構，探索保護骨骼健康的方法。
>
> *Translation: Tags popular science articles, educational resources, teaching content, and research sharing about bones. Learn about the structure of the human skeleton and explore ways to protect bone health.*

**Key considerations when choosing:**

* **Target Audience:** Who are you writing for? This affects the level of detail and technical language used.
* **Content of Your Blog:** What types of posts will be tagged with this?
* **SEO:** Do you need keywords in the description to improve search engine visibility? Choose Option 3 for this.

Choose the description that best suits your needs! Good luck!