Mandarin:
聚对苯二甲酸乙二酯

Explanation in English Language (EN):
A thermoplastic polyester with excellent clarity, strength, and barrier properties. PET is widely used in packaging, fibers, and films.

Explanation in Mandarin (ZH):
一种热塑性聚酯，具有优异的透明度、强度和阻隔性。 PET 广泛用于包装、纤维和薄膜。(Yī zhǒng rè sù xìng jù zhǐ, jù yǒu yōu yì de tòu míng dù, qiáng dù hé zǔ gé xìng. PET guǎng fàn yòng yú bāo zhuāng, xiān wéi hé bó mó.)

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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.