Here are a few options for the WordPress post_tag description, catering to different needs and lengths:

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

> 生命的旅程，從開始到結束的完整循環。 探索生物、事物，或觀念的生命週期。

*Translation: The journey of life, the complete cycle from beginning to end. Explore the life cycle of living things, objects, or concepts.*

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

> 深入了解不同事物，包括生物、項目、專案，甚至想法的生命週期。 從最初的萌芽到最終的消逝，探索其演變，以及在不同階段所經歷的關鍵因素。

*Translation: Gain a deeper understanding of the life cycle of different things, including living things, items, projects, and even ideas. Explore their evolution from their initial beginnings to their final demise, and the key factors they experience at different stages.*

**Option 3 (Suitable for Scientific/Technical Applications):**

> 用於描述生物、物質、產品或系統在其存在期間所經歷的所有階段的標籤。 涵蓋生長、成熟、劣化、以及死亡或汰換。

*Translation: A tag used to describe all the stages that a living organism, substance, product or system goes through during its existence. Covering growth, maturation, degradation, and death or replacement.*

**Option 4 (Focusing on the Blog’s Purpose):**

> 這篇文章標籤涵蓋了文章中與生命週期相關的主題。 例如：產品生命週期、生態系統中的生命週期、或是個人成長的生命週期。

*Translation: This post tag covers topics related to the life cycle discussed in the articles. For example: product life cycles, life cycles in ecosystems, or the life cycle of personal growth.*

**How to choose the best option:**

* **Consider the types of content you’ll tag with “生命週期”:** Are you primarily writing about biology, business, or a broader range of topics? Choose an option that reflects the scope of your content.
* **Think about your target audience:** Who are you writing for? A more technical audience might appreciate Option 3, while a general audience might prefer Option 1 or 2.
* **What is WordPress actually using the description for?** (SEO, internal site use) If you want to prioritize SEO, be more descriptive. If just for your own organizational ease, then shorter works.

When entering this into WordPress, you’ll usually find the description field when you are creating or editing the Tag (Post Tag). Then, to translate “生命週期” directly into the field, I would recommend just the translation already listed. Then consider the following option.

I hope this helps!