Here are a few options for the WordPress post tag description, considering different levels of detail and user understanding, all in Traditional Chinese:

**Option 1: Concise & Direct**

* **Description:** 身體抵抗力弱，易生病。 (Shēn tǐ dǐ kàng lì ruò, yì shēng bìng. – Weak body resistance, prone to illness.)

**Option 2: Slightly more informative**

* **Description:** 探討因免疫力不足引起的健康問題，以及如何提升免疫力的相關資訊。 (Tàn tǎo yīn miǎn yì lì bù zú yǐn qǐ de jiàn kāng wèn tí, yǐ jí rú hé tí shēng miǎn yì lì de xiāng guān zī xùn. – Exploring health problems caused by insufficient immunity, and related information on how to boost immunity.)

**Option 3: Focus on prevention and action**

* **Description:** 關注身體免疫系統的健康，了解如何预防和改善免疫力不足，保持健康活力。 (Guān zhù shēn tǐ miǎn yì xì tǒng de jiàn kāng, liǎo jiě rú hé fáng yù hé gǎi shàn miǎn yì lì bù zú, bǎo chí jiàn kāng huó lì. – Focusing on the health of the body’s immune system, understanding how to prevent and improve insufficient immunity, and maintaining health and vitality.)

**Option 4: More General for a wider audience**

* Description: 談論免疫力低下相關的文章，包括成因、症狀、以及改善方式。 (Tán lùn miǎn yì lì dī xià xiāng guān de wén zhāng, bāo kuò chéng yīn, zhèng zhuàng, yǐ jí gǎi shàn fāng shì.) (Talking about articles related to low immunity, including causes, symptoms, and ways to improve.)

**Choosing the best option:**

* **Consider your audience:** If you cater to a more general readership, Option 2, 3 or 4 are better. If you have an audience that is health-conscious, Option 3 or 4 may be appropriate.
* **Keyword integration:** If the post titles are mostly the same word/phrase, ensure the description is more than just the same phrase.
* **Purpose of the tag:** Is this tag for filtering posts or providing a brief overview of the content?

**How to use the description in WordPress:**

1. **Go to your WordPress admin panel.**
2. **Navigate to “Posts” > “Tags” (or “Categories” depending on what you’re using).**
3. **Find the tag “免疫力不足” (using the ‘edit’ link).**
4. **In the “Description” field, paste your chosen text.**
5. **Click “Update”.**