重大 (zhòng dà) means “great; important; major; significant”. It is an HSK 5 Chinese word in the HSK 3.0 vocabulary.
这次会议讨论的都是关系国家发展的重大问题。
Zhè cì huìyì tǎolùn de dōu shì guānxi guójiā fāzhǎn de zhòngdà wèntí.
This meeting discussed all major issues related to the country's development.
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