Here are a few options for a WordPress post_tag description for “呼吸系統” (Hūxī Xìtǒng – Respiratory System) in Traditional Chinese, ranging from brief to more descriptive, depending on your needs:

**Option 1: Brief & Concise (Best for general use)**

* **Description:** 呼吸系統相關內容。 (Hūxī xìtǒng xiāngguān nèiróng. – Content related to the respiratory system.)

**Option 2: Slightly More Descriptive**

* **Description:** 關於肺部、氣管、呼吸道的文章與資訊。 (Guānyú fèibù, qìguǎn, hūxīdào de wénzhāng yǔ zīxùn. – Articles and information about the lungs, trachea, and respiratory tract.)

**Option 3: Context-Specific (If your blog focuses on health or medicine)**

* **Description:** 健康與醫療相關的呼吸系統知識，包括疾病、預防與照護。 (Jiànkāng yǔ yīliáo xiāngguān de hūxī xìtǒng zhīshì, bāokuò jíbìng, yùfáng yǔ zhàohù. – Respiratory system knowledge related to health and medicine, including diseases, prevention, and care.)

**Option 4: Keyword-Rich (Helps with SEO)**

* **Description:** 呼吸系統專題，涵蓋肺部、氣管、支氣管、呼吸道疾病、呼吸困難、哮喘、慢性阻塞性肺病 (COPD) 等議題。 (Hūxī xìtǒng zhuāntí, hángài fèibù, qìguǎn, zhīqìguǎn, hūxīdào jíbìng, hūxī kùnnán, Xiàochuǎn, mànxìng zǔsè xìng fèibìng (COPD) děng yìtí. – Respiratory system topics, covering the lungs, trachea, bronchi, respiratory diseases, difficulty breathing, asthma, chronic obstructive pulmonary disease (COPD), and other issues.)

**How to Choose:**

* **Your Blog’s Focus:** Choose the description that best reflects the subject matter of your blog. If it’s a general blog, the first option is usually sufficient. If it’s a health blog, options 3 or 4 are better.
* **Target Audience:** Consider the level of knowledge your audience has. Option 4 might be too complex for some readers.
* **Length:** WordPress allows for a decent description length, so don’t be afraid to be a little more descriptive if needed, especially for SEO benefits.

**Important Notes:**

* When entering this into WordPress, make sure the description field is available for tags.
* Consider adding more relevant keywords to your posts using this tag to boost SEO. Keywords like “肺,” “氣管,” “呼吸困難” etc., will help search engines understand and index the content better.