Mandarin:
分散指数

Explanation in English Language (EN):
A measure of the distribution of molecular weights in a polymer sample. A PDI of 1 indicates that all polymer chains have the same molecular weight, while a higher PDI indicates a broader distribution of molecular weights.

Explanation in Mandarin (ZH):
衡量聚合物样品中分子量分布的指标。 PDI 为 1 表示所有聚合物链都具有相同的分子量，而较高的 PDI 表示更宽的分子量分布。(Héng liáng jù hé wù yàng pǐn zhōng fēn zǐ liàng fēn bù de zhǐ biāo. PDI wéi 1 biǎo shì suǒ yǒu jù hé wù liàn dōu jù yǒu xiāng tóng de fēn zǐ liàng, ér jiào gāo de PDI biǎo shì gèng kuān de fēn zǐ liàng fēn bù.)

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International Phonetic Alphabet (IPA)
- Definition: A standardized system of symbols used to represent the sounds of spoken language.
- Purpose: Helps linguists, language learners, and educators accurately describe pronunciation across languages.
- Example: The word “hello” in British English is transcribed as /həˈləʊ/ in IPA.