Here are a few options for the description of the WordPress post_tag “寒天澱粉” (Hanten Den-fen – Agar Starch/Agar-Agar Powder), written in Traditional Chinese, with varying levels of detail and focus:

**Option 1: Concise & Informative**

> 一種由海藻萃取的膠狀多醣，主要成分是寒天，常用於食品製作和實驗室用途。常見於果凍、甜點、培養基等。
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> *Translation: A gelatinous polysaccharide extracted from seaweed, primarily composed of agar. Commonly used in food manufacturing and laboratory applications. Found in jellies, desserts, culture media, and more.*

**Option 2: Slightly More Descriptive**

> 寒天澱粉，亦稱瓊脂，是一種從紅藻（特別是石花菜）中提取的多醣。 它具有凝膠特性，能使液體凝固成膠狀，廣泛應用於食品加工，例如製作果凍、慕斯和布丁。 也可用作微生物培養基等。
>
> *Translation: Agar starch, also known as agar-agar, is a polysaccharide extracted from red algae (especially Gracilaria). It has gelling properties and can solidify liquids, which is widely used in food processing, such as making jellies, mousses, and puddings. It can also be used as a microbiological culture medium, etc.*

**Option 3: Highlighting Usage in Traditional Cuisine (if applicable)**

> 寒天澱粉，是傳統亞洲料理中的重要成分，尤其在日本及台灣甜點中，是製作各種晶瑩剔透、口感Q彈的點心的關鍵。 其由海藻提煉而成，富含膳食纖維，是健康飲食的良好選擇。
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> *Translation: Agar starch is an important ingredient in traditional Asian cuisine, especially in Japanese and Taiwanese desserts. It’s the key to making various crystal-clear, chewy sweets. Extracted from seaweed, it’s rich in dietary fiber and a great choice for healthy eating.*

**Option 4: Focused on Chemical Properties (for more technical posts)**

> 寒天澱粉，是一種長鍊多醣，主要由半乳糖及其衍生物組成。 其凝膠能力受pH值、溫度和離子濃度的影響。 常用於食品、生物科技和實驗室。
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> *Translation: Agar starch is a long-chain polysaccharide primarily composed of galactose and its derivatives. Its gelling ability is affected by pH, temperature, and ion concentration. Commonly used in food, biotechnology, and laboratories.*

**Which Option to Choose?**

* **Consider your target audience:** Are they casual readers interested in recipes, or are they more technically inclined?
* **Match your content:** Does the main post focus on food, science, or a specific cultural context?
* **Keep it concise:** WordPress tag descriptions should ideally be kept short and to the point.

Choose the option that best suits the content of your post and the needs of your readers. Remember to keep it clear, concise, and informative.