HSK 6
巩固
gǒnggù形动
to consolidate; to strengthen; firm; solid; stable
课后复习可以巩固新知识。
Kè hòu fù xí kě yǐ gǒng gù xīn zhī shí.
Review after class can reinforce new knowledge.
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New in the HSK 3.0 word list at level 6.