jīng zhì
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Chinese dictionary
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  • v.refine; make with extra care; make with meticulous care; purify

    • zài shēng xiàng jiāo lǐ jiā liú huáng jīng zhì jiù chéng le pǔ tōng de xiàng jiāo

      橡胶硫磺精制普通橡胶

      Adding sulphur to raw rubber and refining it produces ordinary rubber.