Here are a few options for the WordPress post_tag description for “外來物種” (Wài Lái Wù Zhǒng – Invasive Species) in Traditional Chinese, catering to different audiences and purposes:

**Option 1: General & Concise**

* **Description:** 指非原生於某地區的物種，經由人為或自然途徑引入，可能對當地生態系統造成影響的生物。 (Refers to species not native to a certain area, introduced through human activities or natural means, which may impact the local ecosystem.)

**Option 2: More Explanatory & Engaging**

* **Description:** 我們探索「外來物種」的世界。這些來自他鄉的生物，有的看似無害，卻可能在新的環境中快速繁殖，甚至威脅原生動植物的生存。了解它們的影響，以及我們可以如何應對。 (We explore the world of “invasive species.” These creatures from afar, some appear harmless, but may rapidly multiply in their new environment, even threatening the survival of native flora and fauna. Understand their impact and how we can respond.)

**Option 3: Focused on the Importance of Conservation**

* **Description:** 認識「外來物種」，保護台灣珍貴的生態環境。 了解它們可能造成的危害，共同維護生物多樣性。 (Understand “invasive species,” and protect Taiwan’s precious ecological environment. Learn about the harm they can cause, and work together to safeguard biodiversity.)

**Option 4: Technical & Academic**

* **Description:** 探討外來物種的定義、引入途徑、對生態系統的影響，以及相關的防治策略。 (Explores the definition of invasive species, their introduction pathways, impacts on ecosystems, and relevant control strategies.)

**Which option should you use?**

* Consider your target audience. Are you writing for the general public, students, or researchers?
* Reflect the tone of your website. Is it formal, informal, or scientific?
* Think of the purpose of your content. Are you trying to educate, raise awareness, or provide a detailed analysis?

**How to Add the Description in WordPress:**

1. **Go to the “Tags” section:** In your WordPress admin panel, go to “Posts” -> “Tags.”
2. **Find the “外來物種” tag:** Either search for it or browse the list.
3. **Click “Edit” (or add a new tag):** Click the “Edit” link under the tag title.
4. **Locate the “Description” field:** You might need to scroll down or enable “Screen Options” at the top to make sure the “Description” field is visible. If not, you might need to install a plugin that explicitly adds a description field for tags (though many themes now include this by default).
5. **Enter your chosen description:** Paste or write your chosen description into the “Description” field. This field supports basic HTML, but avoid complex formatting.
6. **Click “Update”:** Save your changes.

The description you add will then be used by some themes in various places, such as below the tag title on tag archive pages, or in a tag cloud widget. Other themes, may or may not show it. You might need to customize your theme (or use a plugin) to display it exactly where you want.