HSK 7-9
阐述
chǎnshù动
to expound (a position); to elaborate (on a topic); to treat (a subject)
他在报告中阐述改革理由。
Tā zài bào gào zhōng chǎn shù gǎi gé lǐ yóu.
He elaborated on the reasons for reform in the report.
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Appears across levels (7-9) in the HSK 3.0 word list.