Here are a few options for descriptions of a WordPress post tag titled “冷媒” (Lěngméi) in Traditional Chinese, ranging in length and focus, along with explanations:

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

* **Description:** 用於製冷系統的物質。 [Yòng yú zhìlěng xìtǒng de wùzhì.] (Substances used in refrigeration systems.)
* **Explanation:** This is a very straightforward and accurate description. It’s ideal if you want to keep it brief and to the point.

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

* **Description:** 冰箱、空調等製冷設備中循環使用的工質，負責吸收熱量並實現製冷效果。 [Bīngxiāng, kōngtiáo děng zhìlěng shèbèi zhōng xúnhuán shǐyòng de gōngzhì, fùzé xīshōu rèliàng bìng shíxiàn zhìlěng xiàoguǒ.] (Working fluids that circulate in refrigeration equipment like refrigerators and air conditioners, responsible for absorbing heat and achieving cooling.)
* **Explanation:** This describes the function of refrigerants in more detail. It mentions common applications (refrigerators, air conditioners) and explains how they work (absorbing heat for cooling).

**Option 3 (Focus on Environmental Concerns – Suitable if related posts cover this):**

* **Description:** 用於製冷系統的物質，關注其對環境的影響及相關替代方案。 [Yòng yú zhìlěng xìtǒng de wùzhì, guānzhù qí duì huánjìng de yǐngxiǎng jí xiāngguān tìdài fāng’àn.] (Substances used in refrigeration systems, focusing on their environmental impact and related alternative solutions.)
* **Explanation:** This is suitable if you have posts discussing the environmental concerns related to refrigerants (e.g., greenhouse gas emissions) and exploring more environmentally friendly alternatives.

**Option 4 (Simple & Broad):**

* **Description:** 與製冷技術相關的資訊。 [Yǔ zhìlěng jìshù xiāngguān de zīxùn.] (Information related to refrigeration technology.)
* **Explanation:** This is a very general description, capturing the purpose of the posts tagged with “冷媒.” Useful if your posts cover diverse aspects of refrigerants.

**How to choose and implement:**

1. **Consider your post content:** The best description depends on the content you’ll be tagging.
2. **WordPress settings:** Go to “Posts” -> “Tags” in your WordPress admin. Edit the “冷媒” tag.
3. **SEO (optional):** While short descriptions will help, if your WordPress theme supports additional meta data, take this opportunity to add a brief title and meta description that focuses on keywords that readers may search online, such as “refrigerant,” “air conditioning,” and “environmental impact.”

I recommend starting with Option 2 or Option 3, depending on the focus of your blog. You can always update it later. Good luck!