Here are a few options for a WordPress post tag description for “淋巴球” (Lymphocyte) in Traditional Chinese, ranging from concise to slightly more detailed, depending on your needs:

**Option 1: Concise and Direct**

* **Description:** 免疫系統中的一種白血球。 (Yi miǎn xìtǒng zhōng de yī zhǒng bái xiěqiú. – A type of white blood cell in the immune system.)

**Option 2: Explaining Function (A Bit More Detailed)**

* **Description:** 淋巴球是免疫系統的重要組成部分，負責識別和攻擊病原體。 (Línbāqiú shì miǎnyì xìtǒng de zhòngyào zǔchéng bùfèn, fùzé shǐ bié hé gōngjí bìngyuántǐ. – Lymphocytes are an important part of the immune system, responsible for recognizing and attacking pathogens.)

**Option 3: Targeting a More General Audience**

* **Description:** 身體裡的免疫細胞，幫助抵禦疾病，包括B細胞、T細胞和自然殺手細胞。 (Shēntǐ lǐ de miǎnyì xìbāo, bāngzhù dǐyù jíbìng, bāokuò B xìbāo, T xìbāo hé zìrán shāshǒu xìbāo. – Immune cells within the body that help fight off illnesses, including B cells, T cells, and natural killer cells.)

**Option 4: Targeted at Researchers/Medical Professionals (Most Detailed)**

* **Description:** 淋巴球，是白血球的一種，起源於骨髓，主要功能是參與免疫反應，包括細胞免疫 (細胞毒性T細胞) 和體液免疫 (B細胞產生抗體), 也包括自然殺手細胞 (NK細胞). (Línbāqiú, shì bái xiěqiú de yī zhǒng, qǐyuán yú gǔsuǐ, zhǔyào gōngnéng shì cānyù miǎnyì fǎnyìng, bāokuò xìbāo miǎnyì (xìbāo dúxìng T xìbāo) hé tǐyè miǎnyì (B xìbāo chǎnshēng kàngtǐ), yě bāokuò zìrán shāshǒu xìbāo (NK xìbāo). – Lymphocytes, a type of white blood cell originating from the bone marrow, whose primary function is to participate in immune responses, including cellular immunity (cytotoxic T cells) and humoral immunity (B cells producing antibodies), also includes natural killer (NK) cells.)

**How to Choose:**

* **Consider your target audience:** Choose the description that best suits the knowledge level of the people likely to read your posts.
* **Think about the post content:** Match the description to the topic of your posts related to “淋巴球.”
* **Keep it concise (generally):** WordPress descriptions should be brief, so users know what each tag represents clearly.

Choose the option that best fits your specific needs. Remember to paste the chosen description into the “Description” field when you add the tag “淋巴球” in your WordPress post tag settings. Good luck!