Here are several options for a WordPress post_tag description for the title “人類需要吃肉嗎？” in Traditional Chinese, ranging in length and focus:

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

> 探討人類飲食習慣與肉食相關議題，包含倫理道德、健康考量與環境影響。

* **Translation:** Exploring the topic of human dietary habits related to meat consumption, including ethical considerations, health concerns, and environmental impacts.
* **Focus:** Broad and encompassing.
* **Best for:** General use.

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

> 深入分析人類對肉食的需求，審視素食、葷食利弊，並探討不同立場、科學研究與個人選擇。

* **Translation:** In-depth analysis of humanity’s need for meat consumption, examining the pros and cons of vegetarianism and omnivorism, and exploring different viewpoints, scientific research, and personal choices.
* **Focus:** Looks deeper into the topic.
* **Best for:** Inviting more engagement.

**Option 3 (Emphasizing Debate):**

> 關於人類飲食和肉食的激烈辯論。 從不同角度檢視吃肉的必要性，包括健康、環境責任、動物權益等面向。 歡迎加入討論！

* **Translation:** The heated debate surrounding human diet and meat consumption. Examining the necessity of eating meat from various angles, including health, environmental responsibility, and animal rights. Discussion welcome!
* **Focus:** Highlighting the controversial nature and encouraging discussion.
* **Best for:** Posts that are likely to generate interaction.

**Option 4 (Focusing on Health):**

> 從健康角度剖析肉食對人類的影響。 探討肉食中所含營養及潛在風險，並提供相關飲食建議。

* **Translation:** Analyzing the impact of meat consumption on humans from a health perspective. Exploring the nutrients and potential risks contained in meat, and providing related dietary advice.
* **Focus:** Targeting those interested in health-related aspects.
* **Best for:** If your post emphasizes health.

**Option 5 (Focusing on Animal Rights/Ethics):**

> 探討人類吃肉的倫理道德爭議。 反思動物權益、動物福利，並檢視肉食產業的影響。

* **Translation:** Exploring the ethical and moral controversies surrounding human meat consumption. Reflecting on animal rights, animal welfare, and examining the impact of the meat industry.
* **Focus:** Targeting those interested in ethics and animal welfare.
* **Best for:** Posts focused on the ethical aspects.

**How to choose:**

* **Consider your post’s content:** The description should accurately reflect the scope and focus of the post.
* **Think about your target audience:** What are their key interests?
* **Keep it concise:** WordPress tag descriptions are ideally short and to the point.
* **Use relevant keywords:** Think about what terms people might search for. Examples include 肉食 (meat consumption), 素食 (vegetarianism), 葷食 (omnivorism), 健康 (health), 動物權益 (animal rights), 環境 (environment).

Select the option that best fits your particular WordPress post. Remember to keep the description relatively short and to the point, and make sure it accurately reflects the content of the post itself. Good luck!