Here are a few options for a WordPress post_tag description for a tag titled “瓊脂” (Aglae/Agar) in Traditional Chinese, ranging from simple to slightly more descriptive:

**Option 1: Short & Sweet**

> 瓊脂 (Agar-agar)，來自海藻的凝膠。

* **Translation:** Agar-agar, a gelling agent from seaweed.
* **Use:** Concise and straightforward. Good if space is limited or you want a quick introduction.

**Option 2: Slightly More Detail**

> 瓊脂，一種由海藻提取的天然凝膠劑，常用於食品、實驗室等領域。

* **Translation:** Agar-agar, a natural gelling agent extracted from seaweed, commonly used in food, laboratories, and other fields.
* **Use:** Offers a bit more context, mentioning its common uses.

**Option 3: Focusing on Uses (if relevant to your content)**

> 瓊脂在烹飪和實驗中扮演的重要角色。從甜品製作到微生物培養，了解瓊脂的各種應用。

* **Translation:** The important role of agar-agar in cooking and experiments. Learn about the various applications of agar-agar, from dessert making to microbial cultures.
* **Use:** Suitable if your content heavily features recipes or scientific applications of agar-agar.

**Option 4: More Technical (if appropriate for your audience)**

> 瓊脂，一種多醣化合物，由海藻細胞壁提取而來，具有凝膠特性，常用作食品添加劑、實驗室培養基等。

* **Translation:** Agar-agar, a polysaccharide compound, extracted from seaweed cell walls, with gelling properties, commonly used as a food additive, laboratory culture medium, etc.
* **Use:** Best if your blog/website is science-focused or caters to a more informed audience.

**Tips for Choosing:**

* **Consider your target audience:** Who are you writing for? Are they familiar with technical terms, or do they prefer simpler language?
* **Think about your content:** Does your blog focus on recipes, scientific topics, or something else? Choose a description that reflects the kind of content you’ll be tagging.
* **Keep it concise:** WordPress tags are generally best when kept short and sweet.

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

1. **Go to Posts > Tags** in your WordPress admin panel.
2. **Find the “瓊脂” tag** (or create it if it doesn’t exist).
3. **Edit the tag.**
4. **Look for the “Description” field.** (If you don’t see it, you might need to enable it. Go to “Screen Options” at the top right of the page, and check the “Description” box).
5. **Paste or type your chosen description** into the “Description” field.
6. **Click “Update” or “Save Changes.”**

Choose the option that best fits your needs and the content of your blog! Good luck!