HSK 7-9
当务之急
dāngwùzhījí(idiom) top priority job; a matter of the greatest urgency
尽快修复供水是当务之急。
Jǐn kuài xiū fù gōng shuǐ shì dāng wù zhī jí.
Restoring the water supply quickly is the top priority.
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Appears across levels (7-9) in the HSK 3.0 word list.