再生 (zài shēng) means “to be reborn; to regenerate; to be a second so-and-so (famous dead person); recycling; regeneration”. It is an HSK 6 Chinese word in the HSK 3.0 vocabulary.
废物可以再生利用。
Fèiwù kěyǐ zàishēng lìyòng.
Waste can be recycled and reused.
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