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催化作用
cuīhuàzuòyòng
1. catalysis

Character Breakdown

催
cuī
to press, to urge
HSK 5 13 丶
化
huà
to change, to convert, to reform; -ize
HSK 3 4 丶
作
zuò
to make; to write, to compose; to act, to perform
HSK 1 7 丶
用
yòng
to use, to employ, to apply; use
HSK 3 5 丶

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